20257135056432 has 30 divisors (see below), whose sum is σ = 56691843248612. Its totient is φ = 6752378352096.

The previous prime is 20257135056409. The next prime is 20257135056451. The reversal of 20257135056432 is 23465053175202.

20257135056432 is a `hidden beast` number, since 2 + 0 + 2 + 5 + 7 + 1 + 3 + 50 + 564 + 32 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70337274358 + ... + 70337274645.

Almost surely, 2^{20257135056432} is an apocalyptic number.

It is an amenable number.

20257135056432 is an abundant number, since it is smaller than the sum of its proper divisors (36434708192180).

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

20257135056432 is a wasteful number, since it uses less digits than its factorization.

20257135056432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140674549017 (or 140674549008 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

It can be divided in two parts, 202571 and 35056432, that added together give a triangular number (35259003 = T₈₃₉₇).

The spelling of 20257135056432 in words is "twenty trillion, two hundred fifty-seven billion, one hundred thirty-five million, fifty-six thousand, four hundred thirty-two".