18212136 has 32 divisors (see below), whose sum is σ = 47511360. Its totient is φ = 5806592.

The previous prime is 18212123. The next prime is 18212143. The reversal of 18212136 is 63121281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15945 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (1484730).

Almost surely, 2^18212136 is an apocalyptic number.

It is an amenable number.

18212136 is an abundant number, since it is smaller than the sum of its proper divisors (29299224).

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

18212136 is a wasteful number, since it uses less digits than its factorization.

18212136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33025 (or 33021 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 18212136 is about 4267.5679256457. The cubic root of 18212136 is about 263.0996648875.

The spelling of 18212136 in words is "eighteen million, two hundred twelve thousand, one hundred thirty-six".