18031939125 has 16 divisors (see below), whose sum is σ = 30005147328. Its totient is φ = 9617034000.

The previous prime is 18031939111. The next prime is 18031939129. The reversal of 18031939125 is 52193913081.

It is not a de Polignac number, because 18031939125 - 2¹⁸ = 18031676981 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18031939129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24042211 + ... + 24042960.

It is an arithmetic number, because the mean of its divisors is an integer number (1875321708).

Almost surely, 2^18031939125 is an apocalyptic number.

18031939125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18031939125 is a deficient number, since it is larger than the sum of its proper divisors (11973208203).

18031939125 is an equidigital number, since it uses as much as digits as its factorization.

18031939125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48085189 (or 48085179 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 18031939125 in words is "eighteen billion, thirty-one million, nine hundred thirty-nine thousand, one hundred twenty-five".