18365625 has 36 divisors (see below), whose sum is σ = 33208812. Its totient is φ = 9780000.

The previous prime is 18365603. The next prime is 18365629. The reversal of 18365625 is 52656381.

It can be written as a sum of positive squares in 6 ways, for example, as 16867449 + 1498176 = 4107^2 + 1224^2 .

It is not a de Polignac number, because 18365625 - 2¹¹ = 18363577 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18365625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18365629) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27799 + ... + 28451.

It is an arithmetic number, because the mean of its divisors is an integer number (922467).

Almost surely, 2^18365625 is an apocalyptic number.

18365625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18365625 is a deficient number, since it is larger than the sum of its proper divisors (14843187).

18365625 is an frugal number, since it uses more digits than its factorization.

18365625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 661 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 18365625 is about 4285.5133881485. The cubic root of 18365625 is about 263.8367189369.

The spelling of 18365625 in words is "eighteen million, three hundred sixty-five thousand, six hundred twenty-five".