18638087325 has 96 divisors (see below), whose sum is σ = 36886389120. Its totient is φ = 8183884800.

The previous prime is 18638087323. The next prime is 18638087333. The reversal of 18638087325 is 52378083681.

It is not a de Polignac number, because 18638087325 - 2¹ = 18638087323 is a prime.

It is a hoax number, since the sum of its digits (51) 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 (18638087323) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 552031 + ... + 584819.

It is an arithmetic number, because the mean of its divisors is an integer number (384233220).

Almost surely, 2^18638087325 is an apocalyptic number.

18638087325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18638087325 is a deficient number, since it is larger than the sum of its proper divisors (18248301795).

18638087325 is a wasteful number, since it uses less digits than its factorization.

18638087325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32879 (or 32874 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 18638087325 in words is "eighteen billion, six hundred thirty-eight million, eighty-seven thousand, three hundred twenty-five".