18906525 has 36 divisors (see below), whose sum is σ = 36947040. Its totient is φ = 9165600.

The previous prime is 18906509. The next prime is 18906551. The reversal of 18906525 is 52560981.

It is a happy number.

It is not a de Polignac number, because 18906525 - 2⁴ = 18906509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18906525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1345 + ... + 6294.

Almost surely, 2^18906525 is an apocalyptic number.

18906525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18906525 is a deficient number, since it is larger than the sum of its proper divisors (18040515).

18906525 is a wasteful number, since it uses less digits than its factorization.

18906525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666 (or 7658 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 18906525 is about 4348.1634053931. The cubic root of 18906525 is about 266.4018508245.

The spelling of 18906525 in words is "eighteen million, nine hundred six thousand, five hundred twenty-five".