18938395045 has 32 divisors (see below), whose sum is σ = 23712289920. Its totient is φ = 14502808320.

The previous prime is 18938394983. The next prime is 18938395051. The reversal of 18938395045 is 54059383981.

It is not a de Polignac number, because 18938395045 - 2²⁵ = 18904840613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9454014 + ... + 9456016.

It is an arithmetic number, because the mean of its divisors is an integer number (741009060).

Almost surely, 2^18938395045 is an apocalyptic number.

It is an amenable number.

18938395045 is a deficient number, since it is larger than the sum of its proper divisors (4773894875).

18938395045 is a wasteful number, since it uses less digits than its factorization.

18938395045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565.

The product of its (nonzero) digits is 4665600, while the sum is 55.

It can be divided in two parts, 1893839 and 5045, that added together give a square (1898884 = 1378²).

The spelling of 18938395045 in words is "eighteen billion, nine hundred thirty-eight million, three hundred ninety-five thousand, forty-five".