18166532 has 12 divisors (see below), whose sum is σ = 32313036. Its totient is φ = 8934240.

The previous prime is 18166507. The next prime is 18166537. The reversal of 18166532 is 23566181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1893376 + 16273156 = 1376^2 + 4034^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18166537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36983 + ... + 37470.

It is an arithmetic number, because the mean of its divisors is an integer number (2692753).

Almost surely, 2^18166532 is an apocalyptic number.

It is an amenable number.

18166532 is a deficient number, since it is larger than the sum of its proper divisors (14146504).

18166532 is a wasteful number, since it uses less digits than its factorization.

18166532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74518 (or 74516 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 18166532 is about 4262.2214865021. The cubic root of 18166532 is about 262.8798769045.

It can be divided in two parts, 18 and 166532, that multiplied together give a triangular number (2997576 = T₂₄₄₈).

The spelling of 18166532 in words is "eighteen million, one hundred sixty-six thousand, five hundred thirty-two".