18012625 has 16 divisors (see below), whose sum is σ = 23259600. Its totient is φ = 13910400.

The previous prime is 18012613. The next prime is 18012647. The reversal of 18012625 is 52621081.

It can be written as a sum of positive squares in 8 ways, for example, as 8427409 + 9585216 = 2903^2 + 3096^2 .

It is not a de Polignac number, because 18012625 - 2¹⁹ = 17488337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 18012625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (1453725).

Almost surely, 2^18012625 is an apocalyptic number.

It is an amenable number.

18012625 is a deficient number, since it is larger than the sum of its proper divisors (5246975).

18012625 is an equidigital number, since it uses as much as digits as its factorization.

18012625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013 (or 5003 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18012625 is about 4244.1282968355. The cubic root of 18012625 is about 262.1353970645.

The spelling of 18012625 in words is "eighteen million, twelve thousand, six hundred twenty-five".