18966525 has 12 divisors (see below), whose sum is σ = 31358112. Its totient is φ = 10115440.

The previous prime is 18966511. The next prime is 18966529. The reversal of 18966525 is 52566981.

It is not a de Polignac number, because 18966525 - 2⁶ = 18966461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18966529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126369 + ... + 126518.

It is an arithmetic number, because the mean of its divisors is an integer number (2613176).

Almost surely, 2^18966525 is an apocalyptic number.

18966525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18966525 is a deficient number, since it is larger than the sum of its proper divisors (12391587).

18966525 is a wasteful number, since it uses less digits than its factorization.

18966525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252900 (or 252895 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 18966525 is about 4355.0574049029. The cubic root of 18966525 is about 266.6833626699.

It can be divided in two parts, 18966 and 525, that added together give a palindrome (19491).

The spelling of 18966525 in words is "eighteen million, nine hundred sixty-six thousand, five hundred twenty-five".