18025040 has 40 divisors (see below), whose sum is σ = 45720288. Its totient is φ = 6554240.

The previous prime is 18025019. The next prime is 18025061. The reversal of 18025040 is 4052081.

It is an interprime number because it is at equal distance from previous prime (18025019) and next prime (18025061).

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 (20).

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, 9362 + ... + 11121.

Almost surely, 2^18025040 is an apocalyptic number.

18025040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18025040 is an abundant number, since it is smaller than the sum of its proper divisors (27695248).

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

18025040 is a wasteful number, since it uses less digits than its factorization.

18025040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507 (or 20501 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 18025040 is about 4245.5906538431. The cubic root of 18025040 is about 262.1956078620.

The spelling of 18025040 in words is "eighteen million, twenty-five thousand, forty".