18688132 has 12 divisors (see below), whose sum is σ = 33258960. Its totient is φ = 9185576.

The previous prime is 18688091. The next prime is 18688139. The reversal of 18688132 is 23188681.

It is a junction number, because it is equal to n+sod(n) for n = 18688091 and 18688100.

It is not an unprimeable number, because it can be changed into a prime (18688139) 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, 39358 + ... + 39829.

It is an arithmetic number, because the mean of its divisors is an integer number (2771580).

Almost surely, 2^18688132 is an apocalyptic number.

It is an amenable number.

18688132 is a deficient number, since it is larger than the sum of its proper divisors (14570828).

18688132 is a wasteful number, since it uses less digits than its factorization.

18688132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79250 (or 79248 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 18688132 is about 4322.9772148370. The cubic root of 18688132 is about 265.3721222777.

It can be divided in two parts, 1868 and 8132, that added together give a 4-th power (10000 = 10⁴).

The spelling of 18688132 in words is "eighteen million, six hundred eighty-eight thousand, one hundred thirty-two".