18135398938924 has 96 divisors (see below), whose sum is σ = 34202885713920. Its totient is φ = 8386809403392.

The previous prime is 18135398938919. The next prime is 18135398938933. The reversal of 18135398938924 is 42983989353181.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3509848189 + ... + 3509853355.

It is an arithmetic number, because the mean of its divisors is an integer number (356280059520).

Almost surely, 2^{18135398938924} is an apocalyptic number.

It is an amenable number.

18135398938924 is a deficient number, since it is larger than the sum of its proper divisors (16067486774996).

18135398938924 is a wasteful number, since it uses less digits than its factorization.

18135398938924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487 (or 7485 counting only the distinct ones).

The product of its digits is 403107840, while the sum is 73.

The spelling of 18135398938924 in words is "eighteen trillion, one hundred thirty-five billion, three hundred ninety-eight million, nine hundred thirty-eight thousand, nine hundred twenty-four".