18984345874 has 16 divisors (see below), whose sum is σ = 31656280320. Its totient is φ = 8479360080.

The previous prime is 18984345847. The next prime is 18984345883. The reversal of 18984345874 is 47854348981.

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, 11776084 + ... + 11777695.

It is an arithmetic number, because the mean of its divisors is an integer number (1978517520).

Almost surely, 2^18984345874 is an apocalyptic number.

18984345874 is a deficient number, since it is larger than the sum of its proper divisors (12671934446).

18984345874 is a wasteful number, since it uses less digits than its factorization.

18984345874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23553825.

The product of its digits is 30965760, while the sum is 61.

The spelling of 18984345874 in words is "eighteen billion, nine hundred eighty-four million, three hundred forty-five thousand, eight hundred seventy-four".