18297893278 has 16 divisors (see below), whose sum is σ = 31371706080. Its totient is φ = 7840982016.

The previous prime is 18297893269. The next prime is 18297893291. The reversal of 18297893278 is 87239879281.

It is a congruent number.

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, 42418 + ... + 195946.

It is an arithmetic number, because the mean of its divisors is an integer number (1960731630).

Almost surely, 2^18297893278 is an apocalyptic number.

18297893278 is a deficient number, since it is larger than the sum of its proper divisors (13073812802).

18297893278 is a wasteful number, since it uses less digits than its factorization.

18297893278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162051.

The product of its digits is 24385536, while the sum is 64.

The spelling of 18297893278 in words is "eighteen billion, two hundred ninety-seven million, eight hundred ninety-three thousand, two hundred seventy-eight".