20188959288 has 32 divisors (see below), whose sum is σ = 50572771200. Its totient is φ = 6716270048.

The previous prime is 20188959247. The next prime is 20188959293. The reversal of 20188959288 is 88295988102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824118 + ... + 848261.

It is an arithmetic number, because the mean of its divisors is an integer number (1580399100).

Almost surely, 2^20188959288 is an apocalyptic number.

It is an amenable number.

20188959288 is an abundant number, since it is smaller than the sum of its proper divisors (30383811912).

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

20188959288 is a wasteful number, since it uses less digits than its factorization.

20188959288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672891 (or 1672887 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 60.

The spelling of 20188959288 in words is "twenty billion, one hundred eighty-eight million, nine hundred fifty-nine thousand, two hundred eighty-eight".