20679349718 has 16 divisors (see below), whose sum is σ = 31268160000. Its totient is φ = 10256812032.

The previous prime is 20679349709. The next prime is 20679349721. The reversal of 20679349718 is 81794397602.

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, 184043 + ... + 274281.

It is an arithmetic number, because the mean of its divisors is an integer number (1954260000).

Almost surely, 2^20679349718 is an apocalyptic number.

20679349718 is a deficient number, since it is larger than the sum of its proper divisors (10588810282).

20679349718 is a wasteful number, since it uses less digits than its factorization.

20679349718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91159.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 20679349718 in words is "twenty billion, six hundred seventy-nine million, three hundred forty-nine thousand, seven hundred eighteen".