20939220912 has 20 divisors (see below), whose sum is σ = 54092987480. Its totient is φ = 6979740288.

The previous prime is 20939220901. The next prime is 20939220923. The reversal of 20939220912 is 21902293902.

It is an interprime number because it is at equal distance from previous prime (20939220901) and next prime (20939220923).

It is a super-2 number, since 2×20939220912² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218116837 + ... + 218116932.

It is an arithmetic number, because the mean of its divisors is an integer number (2704649374).

Almost surely, 2^20939220912 is an apocalyptic number.

It is an amenable number.

20939220912 is an abundant number, since it is smaller than the sum of its proper divisors (33153766568).

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

20939220912 is a wasteful number, since it uses less digits than its factorization.

20939220912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436233780 (or 436233774 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 20939220912 in words is "twenty billion, nine hundred thirty-nine million, two hundred twenty thousand, nine hundred twelve".