18378725 has 12 divisors (see below), whose sum is σ = 23781216. Its totient is φ = 14063280.

The previous prime is 18378713. The next prime is 18378749. The reversal of 18378725 is 52787381.

It is not a de Polignac number, because 18378725 - 2¹⁶ = 18313189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15407 + ... + 16556.

It is an arithmetic number, because the mean of its divisors is an integer number (1981768).

Almost surely, 2^18378725 is an apocalyptic number.

It is an amenable number.

18378725 is a deficient number, since it is larger than the sum of its proper divisors (5402491).

18378725 is a wasteful number, since it uses less digits than its factorization.

18378725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31996 (or 31991 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 18378725 is about 4287.0415206760. The cubic root of 18378725 is about 263.8994346458.

The spelling of 18378725 in words is "eighteen million, three hundred seventy-eight thousand, seven hundred twenty-five".