18690525 has 36 divisors (see below), whose sum is σ = 38262432. Its totient is φ = 8543520.

The previous prime is 18690493. The next prime is 18690527. The reversal of 18690525 is 52509681.

It is a happy number.

It is not a de Polignac number, because 18690525 - 2⁵ = 18690493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18690525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18690527) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4359 + ... + 7508.

Almost surely, 2^18690525 is an apocalyptic number.

18690525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18690525 is an abundant number, since it is smaller than the sum of its proper divisors (19571907).

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

18690525 is a wasteful number, since it uses less digits than its factorization.

18690525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11890 (or 11882 counting only the distinct ones).

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

The square root of 18690525 is about 4323.2539828236. The cubic root of 18690525 is about 265.3834486886.

The spelling of 18690525 in words is "eighteen million, six hundred ninety thousand, five hundred twenty-five".