18040725 has 60 divisors (see below), whose sum is σ = 34209120. Its totient is φ = 9396000.

The previous prime is 18040703. The next prime is 18040751. The reversal of 18040725 is 52704081.

It is not a de Polignac number, because 18040725 - 2⁶ = 18040661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 119400 + ... + 119550.

It is an arithmetic number, because the mean of its divisors is an integer number (570152).

Almost surely, 2^18040725 is an apocalyptic number.

18040725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18040725 is a deficient number, since it is larger than the sum of its proper divisors (16168395).

18040725 is a wasteful number, since it uses less digits than its factorization.

18040725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18040725 is about 4247.4374627533. The cubic root of 18040725 is about 262.2716381289.

The spelling of 18040725 in words is "eighteen million, forty thousand, seven hundred twenty-five".