18224125 has 16 divisors (see below), whose sum is σ = 23482368. Its totient is φ = 14106000.

The previous prime is 18224117. The next prime is 18224149. The reversal of 18224125 is 52142281.

It is not a de Polignac number, because 18224125 - 2³ = 18224117 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18224125.

It is a congruent number.

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, 1524 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (1467648).

Almost surely, 2^18224125 is an apocalyptic number.

It is an amenable number.

18224125 is a deficient number, since it is larger than the sum of its proper divisors (5258243).

18224125 is an equidigital number, since it uses as much as digits as its factorization.

18224125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4739 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 18224125 is about 4268.9723587768. The cubic root of 18224125 is about 263.1573848236.

The spelling of 18224125 in words is "eighteen million, two hundred twenty-four thousand, one hundred twenty-five".