18366725 has 24 divisors (see below), whose sum is σ = 25331712. Its totient is φ = 13118400.

The previous prime is 18366721. The next prime is 18366731. The reversal of 18366725 is 52766381.

It is not a de Polignac number, because 18366725 - 2² = 18366721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9164 + ... + 10986.

It is an arithmetic number, because the mean of its divisors is an integer number (1055488).

Almost surely, 2^18366725 is an apocalyptic number.

It is an amenable number.

18366725 is a deficient number, since it is larger than the sum of its proper divisors (6964987).

18366725 is a wasteful number, since it uses less digits than its factorization.

18366725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877 (or 1872 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 18366725 is about 4285.6417255762. The cubic root of 18366725 is about 263.8419862882.

It can be divided in two parts, 18366 and 725, that added together give a palindrome (19091).

The spelling of 18366725 in words is "eighteen million, three hundred sixty-six thousand, seven hundred twenty-five".