20366972736 has 56 divisors (see below), whose sum is σ = 58786495584. Its totient is φ = 6171809280.

The previous prime is 20366972713. The next prime is 20366972767. The reversal of 20366972736 is 63727966302.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 4819615 + ... + 4823838.

Almost surely, 2^20366972736 is an apocalyptic number.

It is an amenable number.

20366972736 is an abundant number, since it is smaller than the sum of its proper divisors (38419522848).

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

20366972736 is a wasteful number, since it uses less digits than its factorization.

20366972736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643479 (or 9643469 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 51.

The spelling of 20366972736 in words is "twenty billion, three hundred sixty-six million, nine hundred seventy-two thousand, seven hundred thirty-six".