20157796968 has 64 divisors (see below), whose sum is σ = 52411972800. Its totient is φ = 6455393280.

The previous prime is 20157796931. The next prime is 20157796969. The reversal of 20157796968 is 86969775102.

It is not an unprimeable number, because it can be changed into a prime (20157796969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97153 + ... + 223056.

It is an arithmetic number, because the mean of its divisors is an integer number (818937075).

Almost surely, 2^20157796968 is an apocalyptic number.

It is an amenable number.

20157796968 is an abundant number, since it is smaller than the sum of its proper divisors (32254175832).

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

20157796968 is a wasteful number, since it uses less digits than its factorization.

20157796968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320322 (or 320318 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 20157796968 in words is "twenty billion, one hundred fifty-seven million, seven hundred ninety-six thousand, nine hundred sixty-eight".