20157773504 has 42 divisors (see below), whose sum is σ = 43645154772. Its totient is φ = 9160912000.

The previous prime is 20157773501. The next prime is 20157773543. The reversal of 20157773504 is 40537775102.

It is not an unprimeable number, because it can be changed into a prime (20157773501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3764429 + ... + 3769779.

Almost surely, 2^20157773504 is an apocalyptic number.

It is an amenable number.

20157773504 is an abundant number, since it is smaller than the sum of its proper divisors (23487381268).

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

20157773504 is an frugal number, since it uses more digits than its factorization.

20157773504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725 (or 5364 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 41.

The spelling of 20157773504 in words is "twenty billion, one hundred fifty-seven million, seven hundred seventy-three thousand, five hundred four".