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20054102445 = 3351317672167
BaseRepresentation
bin10010101011010100…
…010101000110101101
31220202121022221212000
4102223110111012231
5312032322234240
613113541002513
71306650025656
oct225324250655
956677287760
1020054102445
118561021a93
123a780b3439
131b7796b410
14d8356a52d
157c58a6430
hex4ab5151ad

20054102445 has 64 divisors (see below), whose sum is σ = 40652720640. Its totient is φ = 9292022784.

The previous prime is 20054102413. The next prime is 20054102489. The reversal of 20054102445 is 54420145002.

20054102445 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 410 + 244 + 5 = 666.

It is not a de Polignac number, because 20054102445 - 25 = 20054102413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 306249 + ... + 365918.

It is an arithmetic number, because the mean of its divisors is an integer number (635198760).

Almost surely, 220054102445 is an apocalyptic number.

It is an amenable number.

20054102445 is an abundant number, since it is smaller than the sum of its proper divisors (20598618195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20054102445 is a wasteful number, since it uses less digits than its factorization.

20054102445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672211 (or 672205 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 20054102445 its reverse (54420145002), we get a palindrome (74474247447).

The spelling of 20054102445 in words is "twenty billion, fifty-four million, one hundred two thousand, four hundred forty-five".

Divisors: 1 3 5 9 13 15 17 27 39 45 51 65 85 117 135 153 195 221 255 351 459 585 663 765 1105 1755 1989 2295 3315 5967 9945 29835 672167 2016501 3360835 6049503 8738171 10082505 11426839 18148509 26214513 30247515 34280517 43690855 57134195 78643539 90742545 102841551 131072565 148548907 171402585 235930617 308524653 393217695 445646721 514207755 742744535 1179653085 1336940163 1542623265 2228233605 4010820489 6684700815 20054102445