20157894464 has 14 divisors (see below), whose sum is σ = 40000821954. Its totient is φ = 10078947200.

The previous prime is 20157894451. The next prime is 20157894479. The reversal of 20157894464 is 46449875102.

It can be written as a sum of positive squares in only one way, i.e., 17657094400 + 2500800064 = 132880^2 + 50008^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157483487 + ... + 157483614.

Almost surely, 2^20157894464 is an apocalyptic number.

It is an amenable number.

20157894464 is a deficient number, since it is larger than the sum of its proper divisors (19842927490).

20157894464 is an equidigital number, since it uses as much as digits as its factorization.

20157894464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314967113 (or 314967103 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 20157894464 in words is "twenty billion, one hundred fifty-seven million, eight hundred ninety-four thousand, four hundred sixty-four".