18951679916 has 48 divisors (see below), whose sum is σ = 37102259040. Its totient is φ = 8410106880.

The previous prime is 18951679861. The next prime is 18951679927. The reversal of 18951679916 is 61997615981.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337355 + ... + 389501.

It is an arithmetic number, because the mean of its divisors is an integer number (772963730).

Almost surely, 2^18951679916 is an apocalyptic number.

It is an amenable number.

18951679916 is a deficient number, since it is larger than the sum of its proper divisors (18150579124).

18951679916 is a wasteful number, since it uses less digits than its factorization.

18951679916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52434 (or 52432 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 62.

The spelling of 18951679916 in words is "eighteen billion, nine hundred fifty-one million, six hundred seventy-nine thousand, nine hundred sixteen".