18133386 has 16 divisors (see below), whose sum is σ = 36310368. Its totient is φ = 6037200.

The previous prime is 18133369. The next prime is 18133387. The reversal of 18133386 is 68333181.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18133387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6576 + ... + 8916.

It is an arithmetic number, because the mean of its divisors is an integer number (2269398).

Almost surely, 2^18133386 is an apocalyptic number.

18133386 is an abundant number, since it is smaller than the sum of its proper divisors (18176982).

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

18133386 is a wasteful number, since it uses less digits than its factorization.

18133386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637.

The product of its digits is 10368, while the sum is 33.

The square root of 18133386 is about 4258.3313633394. The cubic root of 18133386 is about 262.7198991833.

The spelling of 18133386 in words is "eighteen million, one hundred thirty-three thousand, three hundred eighty-six".