18474273898 has 16 divisors (see below), whose sum is σ = 29401769664. Its totient is φ = 8675916480.

The previous prime is 18474273887. The next prime is 18474273901. The reversal of 18474273898 is 89837247481.

It is a super-2 number, since 2×18474273898² (a number of 21 digits) contains 22 as substring.

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, 541308 + ... + 574423.

It is an arithmetic number, because the mean of its divisors is an integer number (1837610604).

Almost surely, 2^18474273898 is an apocalyptic number.

18474273898 is a deficient number, since it is larger than the sum of its proper divisors (10927495766).

18474273898 is a wasteful number, since it uses less digits than its factorization.

18474273898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116237.

The product of its digits is 21676032, while the sum is 61.

The spelling of 18474273898 in words is "eighteen billion, four hundred seventy-four million, two hundred seventy-three thousand, eight hundred ninety-eight".