18461894679 has 32 divisors (see below), whose sum is σ = 28551874560. Its totient is φ = 11767957344.

The previous prime is 18461894669. The next prime is 18461894713. The reversal of 18461894679 is 97649816481.

18461894679 is a `hidden beast` number, since 1 + 8 + 4 + 618 + 9 + 4 + 6 + 7 + 9 = 666.

It is not a de Polignac number, because 18461894679 - 2⁹ = 18461894167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461894629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2071557 + ... + 2080449.

It is an arithmetic number, because the mean of its divisors is an integer number (892246080).

Almost surely, 2^18461894679 is an apocalyptic number.

18461894679 is a deficient number, since it is larger than the sum of its proper divisors (10089979881).

18461894679 is a wasteful number, since it uses less digits than its factorization.

18461894679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12268 (or 12262 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 18461894679 in words is "eighteen billion, four hundred sixty-one million, eight hundred ninety-four thousand, six hundred seventy-nine".