18036725 has 12 divisors (see below), whose sum is σ = 25560864. Its totient is φ = 12367920.

The previous prime is 18036709. The next prime is 18036751. The reversal of 18036725 is 52763081.

It is a happy number.

It is not a de Polignac number, because 18036725 - 2⁴ = 18036709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18036691 and 18036700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51359 + ... + 51708.

It is an arithmetic number, because the mean of its divisors is an integer number (2130072).

Almost surely, 2^18036725 is an apocalyptic number.

It is an amenable number.

18036725 is a deficient number, since it is larger than the sum of its proper divisors (7524139).

18036725 is a wasteful number, since it uses less digits than its factorization.

18036725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103084 (or 103079 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 18036725 is about 4246.9665645022. The cubic root of 18036725 is about 262.2522530229.

The spelling of 18036725 in words is "eighteen million, thirty-six thousand, seven hundred twenty-five".