18860625 has 60 divisors (see below), whose sum is σ = 38987520. Its totient is φ = 8604000.

The previous prime is 18860609. The next prime is 18860627. The reversal of 18860625 is 52606881.

It is a happy number.

It is not a de Polignac number, because 18860625 - 2⁴ = 18860609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18860625.

It is not an unprimeable number, because it can be changed into a prime (18860627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 39136 + ... + 39614.

It is an arithmetic number, because the mean of its divisors is an integer number (649792).

Almost surely, 2^18860625 is an apocalyptic number.

18860625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18860625 is an abundant number, since it is smaller than the sum of its proper divisors (20126895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18860625 is an equidigital number, since it uses as much as digits as its factorization.

18860625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 18860625 is about 4342.8821075410. The cubic root of 18860625 is about 266.1860919152.

The spelling of 18860625 in words is "eighteen million, eight hundred sixty thousand, six hundred twenty-five".