18394515898874 has 16 divisors (see below), whose sum is σ = 27603382093056. Its totient is φ = 9193388786400.

The previous prime is 18394515898849. The next prime is 18394515898901. The reversal of 18394515898874 is 47889851549381.

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, 236970329 + ... + 237047939.

It is an arithmetic number, because the mean of its divisors is an integer number (1725211380816).

Almost surely, 2^{18394515898874} is an apocalyptic number.

18394515898874 is a deficient number, since it is larger than the sum of its proper divisors (9208866194182).

18394515898874 is a wasteful number, since it uses less digits than its factorization.

18394515898874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125941.

The product of its digits is 2786918400, while the sum is 80.

The spelling of 18394515898874 in words is "eighteen trillion, three hundred ninety-four billion, five hundred fifteen million, eight hundred ninety-eight thousand, eight hundred seventy-four".