18861395134 has 16 divisors (see below), whose sum is σ = 29540512800. Its totient is φ = 9015066720.

The previous prime is 18861395039. The next prime is 18861395191. The reversal of 18861395134 is 43159316881.

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, 51909 + ... + 201040.

It is an arithmetic number, because the mean of its divisors is an integer number (1846282050).

Almost surely, 2^18861395134 is an apocalyptic number.

18861395134 is a deficient number, since it is larger than the sum of its proper divisors (10679117666).

18861395134 is a wasteful number, since it uses less digits than its factorization.

18861395134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254595.

The product of its digits is 622080, while the sum is 49.

The spelling of 18861395134 in words is "eighteen billion, eight hundred sixty-one million, three hundred ninety-five thousand, one hundred thirty-four".