18746365865 has 16 divisors (see below), whose sum is σ = 23692984320. Its totient is φ = 14199753600.

The previous prime is 18746365831. The next prime is 18746365873. The reversal of 18746365865 is 56856364781.

It is a de Polignac number, because none of the positive numbers 2^k-18746365865 is a prime.

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, 116312 + ... + 225878.

It is an arithmetic number, because the mean of its divisors is an integer number (1480811520).

Almost surely, 2^18746365865 is an apocalyptic number.

It is an amenable number.

18746365865 is a deficient number, since it is larger than the sum of its proper divisors (4946618455).

18746365865 is a wasteful number, since it uses less digits than its factorization.

18746365865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111392.

The product of its digits is 29030400, while the sum is 59.

The spelling of 18746365865 in words is "eighteen billion, seven hundred forty-six million, three hundred sixty-five thousand, eight hundred sixty-five".