20712274992 has 80 divisors (see below), whose sum is σ = 61058755680. Its totient is φ = 6717489408.

The previous prime is 20712274987. The next prime is 20712275021. The reversal of 20712274992 is 29947221702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631923 + ... + 663890.

It is an arithmetic number, because the mean of its divisors is an integer number (763234446).

Almost surely, 2^20712274992 is an apocalyptic number.

It is an amenable number.

20712274992 is an abundant number, since it is smaller than the sum of its proper divisors (40346480688).

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

20712274992 is a wasteful number, since it uses less digits than its factorization.

20712274992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295867 (or 1295855 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20712274992 in words is "twenty billion, seven hundred twelve million, two hundred seventy-four thousand, nine hundred ninety-two".