18709879964 has 12 divisors (see below), whose sum is σ = 32866787184. Its totient is φ = 9319369344.

The previous prime is 18709879957. The next prime is 18709879973. The reversal of 18709879964 is 46997890781.

It is a junction number, because it is equal to n+sod(n) for n = 18709879894 and 18709879903.

It is a congruent number.

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, 8891477 + ... + 8893580.

It is an arithmetic number, because the mean of its divisors is an integer number (2738898932).

Almost surely, 2^18709879964 is an apocalyptic number.

It is an amenable number.

18709879964 is a deficient number, since it is larger than the sum of its proper divisors (14156907220).

18709879964 is a wasteful number, since it uses less digits than its factorization.

18709879964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17785324 (or 17785322 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 18709879964 in words is "eighteen billion, seven hundred nine million, eight hundred seventy-nine thousand, nine hundred sixty-four".