18688134 has 32 divisors (see below), whose sum is σ = 41662080. Its totient is φ = 5553792.

The previous prime is 18688091. The next prime is 18688139. The reversal of 18688134 is 43188681.

It is a junction number, because it is equal to n+sod(n) for n = 18688092 and 18688101.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2884 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (1301940).

Almost surely, 2^18688134 is an apocalyptic number.

18688134 is an abundant number, since it is smaller than the sum of its proper divisors (22973946).

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

18688134 is a wasteful number, since it uses less digits than its factorization.

18688134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684.

The product of its digits is 36864, while the sum is 39.

The square root of 18688134 is about 4322.9774461591. The cubic root of 18688134 is about 265.3721317444.

The spelling of 18688134 in words is "eighteen million, six hundred eighty-eight thousand, one hundred thirty-four".