18440125 has 16 divisors (see below), whose sum is σ = 25107264. Its totient is φ = 13410000.

The previous prime is 18440111. The next prime is 18440129. The reversal of 18440125 is 52104481.

It is not a de Polignac number, because 18440125 - 2¹⁵ = 18407357 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 18440125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5331 + ... + 8080.

It is an arithmetic number, because the mean of its divisors is an integer number (1569204).

Almost surely, 2^18440125 is an apocalyptic number.

It is an amenable number.

18440125 is a deficient number, since it is larger than the sum of its proper divisors (6667139).

18440125 is a wasteful number, since it uses less digits than its factorization.

18440125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13437 (or 13427 counting only the distinct ones).

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

The square root of 18440125 is about 4294.1966652681. The cubic root of 18440125 is about 264.1929880971.

The spelling of 18440125 in words is "eighteen million, four hundred forty thousand, one hundred twenty-five".