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20424811725 = 3252103387877
BaseRepresentation
bin10011000001011010…
…011110010011001101
31221201102212221101100
4103001122132103031
5313312222433400
613214422333313
71322101015023
oct230132362315
957642787340
1020424811725
11873130139a
123b6028a239
131c066c5816
14dba8a8713
157e81d1100
hex4c169e4cd

20424811725 has 36 divisors (see below), whose sum is σ = 36618938356. Its totient is φ = 10882563840.

The previous prime is 20424811711. The next prime is 20424811733. The reversal of 20424811725 is 52711842402.

20424811725 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 481 + 172 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2088672804 + 18336138921 = 45702^2 + 135411^2 .

It is not a de Polignac number, because 20424811725 - 24 = 20424811709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20424811725.

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 35 ways as a sum of consecutive naturals, for example, 188487 + ... + 276363.

Almost surely, 220424811725 is an apocalyptic number.

20424811725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20424811725 is a deficient number, since it is larger than the sum of its proper divisors (16194126631).

20424811725 is a wasteful number, since it uses less digits than its factorization.

20424811725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88926 (or 88918 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 20424811725 in words is "twenty billion, four hundred twenty-four million, eight hundred eleven thousand, seven hundred twenty-five".

Divisors: 1 3 5 9 15 25 45 75 225 1033 3099 5165 9297 15495 25825 46485 77475 87877 232425 263631 439385 790893 1318155 2196925 3954465 6590775 19772325 90776941 272330823 453884705 816992469 1361654115 2269423525 4084962345 6808270575 20424811725