18425040 has 40 divisors (see below), whose sum is σ = 57118368. Its totient is φ = 4913280.

The previous prime is 18425039. The next prime is 18425083. The reversal of 18425040 is 4052481.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18425040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38146 + ... + 38625.

Almost surely, 2^18425040 is an apocalyptic number.

18425040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18425040 is an abundant number, since it is smaller than the sum of its proper divisors (38693328).

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

18425040 is a wasteful number, since it uses less digits than its factorization.

18425040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76787 (or 76781 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 18425040 is about 4292.4398656242. The cubic root of 18425040 is about 264.1209271528.

The spelling of 18425040 in words is "eighteen million, four hundred twenty-five thousand, forty".