21990584112 has 40 divisors (see below), whose sum is σ = 64924582656. Its totient is φ = 6283023936.

The previous prime is 21990584089. The next prime is 21990584129. The reversal of 21990584112 is 21148509912.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 32723748 + ... + 32724419.

Almost surely, 2^21990584112 is an apocalyptic number.

It is an amenable number.

21990584112 is an abundant number, since it is smaller than the sum of its proper divisors (42933998544).

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

21990584112 is a wasteful number, since it uses less digits than its factorization.

21990584112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65448185 (or 65448179 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 21990584112 in words is "twenty-one billion, nine hundred ninety million, five hundred eighty-four thousand, one hundred twelve".