20157738288 has 20 divisors (see below), whose sum is σ = 52074157368. Its totient is φ = 6719246080.

The previous prime is 20157738283. The next prime is 20157738299. The reversal of 20157738288 is 88283775102.

It is a self number, because there is not a number n which added to its sum of digits gives 20157738288.

It is not an unprimeable number, because it can be changed into a prime (20157738281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209976393 + ... + 209976488.

Almost surely, 2^20157738288 is an apocalyptic number.

It is an amenable number.

20157738288 is an abundant number, since it is smaller than the sum of its proper divisors (31916419080).

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

20157738288 is a wasteful number, since it uses less digits than its factorization.

20157738288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419952892 (or 419952886 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 20157738288 in words is "twenty billion, one hundred fifty-seven million, seven hundred thirty-eight thousand, two hundred eighty-eight".