20875489872 has 40 divisors (see below), whose sum is σ = 54352997376. Its totient is φ = 6903703296.

The previous prime is 20875489781. The next prime is 20875489883. The reversal of 20875489872 is 27898457802.

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, 1706133 + ... + 1718324.

Almost surely, 2^20875489872 is an apocalyptic number.

It is an amenable number.

20875489872 is an abundant number, since it is smaller than the sum of its proper divisors (33477507504).

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

20875489872 is a wasteful number, since it uses less digits than its factorization.

20875489872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424595 (or 3424589 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 20875489872 in words is "twenty billion, eight hundred seventy-five million, four hundred eighty-nine thousand, eight hundred seventy-two".