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BaseRepresentation
bin1001010001001001110010…
…00001101001110110110101
32200011100211102101121101021
410220210321001221312311
510132403410044220141
6111202412502301141
74202306454245446
oct450447101516665
980140742347337
1020380576554421
116548399165276
122351a85a277b1
13b4ab598244c5
145065d493b2cd
1525522b44e6d1
hex128939069db5

20380576554421 has 4 divisors (see below), whose sum is σ = 20380621649344. Its totient is φ = 20380531459500.

The previous prime is 20380576554413. The next prime is 20380576554449. The reversal of 20380576554421 is 12445567508302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20380576554421 - 23 = 20380576554413 is a prime.

It is a super-2 number, since 2×203805765544212 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380576552421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21862605 + ... + 22775746.

It is an arithmetic number, because the mean of its divisors is an integer number (5095155412336).

Almost surely, 220380576554421 is an apocalyptic number.

It is an amenable number.

20380576554421 is a deficient number, since it is larger than the sum of its proper divisors (45094923).

20380576554421 is an equidigital number, since it uses as much as digits as its factorization.

20380576554421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45094922.

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 20380576554421 in words is "twenty trillion, three hundred eighty billion, five hundred seventy-six million, five hundred fifty-four thousand, four hundred twenty-one".

Divisors: 1 456571 44638351 20380576554421