20972170376 has 16 divisors (see below), whose sum is σ = 39326078400. Its totient is φ = 10485216144.

The previous prime is 20972170357. The next prime is 20972170433. The reversal of 20972170376 is 67307127902.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 365 + ... + 204803.

It is an arithmetic number, because the mean of its divisors is an integer number (2457879900).

Almost surely, 2^20972170376 is an apocalyptic number.

It is an amenable number.

20972170376 is a deficient number, since it is larger than the sum of its proper divisors (18353908024).

20972170376 is a wasteful number, since it uses less digits than its factorization.

20972170376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217268 (or 217264 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 44.

The spelling of 20972170376 in words is "twenty billion, nine hundred seventy-two million, one hundred seventy thousand, three hundred seventy-six".