20257553695168 has 56 divisors (see below), whose sum is σ = 40615337274624. Its totient is φ = 10023779942400.

The previous prime is 20257553695139. The next prime is 20257553695187. The reversal of 20257553695168 is 86159635575202.

It is a super-2 number, since 2×20257553695168² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

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 7 ways as a sum of consecutive naturals, for example, 120295188 + ... + 120463468.

It is an arithmetic number, because the mean of its divisors is an integer number (725273879904).

Almost surely, 2^{20257553695168} is an apocalyptic number.

It is an amenable number.

20257553695168 is an abundant number, since it is smaller than the sum of its proper divisors (20357783579456).

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

20257553695168 is a wasteful number, since it uses less digits than its factorization.

20257553695168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187781 (or 187771 counting only the distinct ones).

The product of its (nonzero) digits is 136080000, while the sum is 64.

The spelling of 20257553695168 in words is "twenty trillion, two hundred fifty-seven billion, five hundred fifty-three million, six hundred ninety-five thousand, one hundred sixty-eight".