18688146 has 16 divisors (see below), whose sum is σ = 37889184. Its totient is φ = 6143904.

The previous prime is 18688139. The next prime is 18688157. The reversal of 18688146 is 64188681.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18688098 and 18688107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20896 + ... + 21771.

It is an arithmetic number, because the mean of its divisors is an integer number (2368074).

Almost surely, 2^18688146 is an apocalyptic number.

18688146 is an abundant number, since it is smaller than the sum of its proper divisors (19201038).

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

18688146 is a wasteful number, since it uses less digits than its factorization.

18688146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42745.

The product of its digits is 73728, while the sum is 42.

The square root of 18688146 is about 4322.9788340911. The cubic root of 18688146 is about 265.3721885445.

The spelling of 18688146 in words is "eighteen million, six hundred eighty-eight thousand, one hundred forty-six".