20679814976 has 14 divisors (see below), whose sum is σ = 41036507970. Its totient is φ = 10339907456.

The previous prime is 20679814949. The next prime is 20679814979. The reversal of 20679814976 is 67941897602.

It can be written as a sum of positive squares in only one way, i.e., 19757113600 + 922701376 = 140560^2 + 30376^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679814979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161560991 + ... + 161561118.

Almost surely, 2^20679814976 is an apocalyptic number.

It is an amenable number.

20679814976 is a deficient number, since it is larger than the sum of its proper divisors (20356692994).

20679814976 is an equidigital number, since it uses as much as digits as its factorization.

20679814976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323122121 (or 323122111 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 20679814976 in words is "twenty billion, six hundred seventy-nine million, eight hundred fourteen thousand, nine hundred seventy-six".