18372436 has 12 divisors (see below), whose sum is σ = 32182612. Its totient is φ = 9177408.

The previous prime is 18372433. The next prime is 18372437. The reversal of 18372436 is 63427381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 4384836 = 3740^2 + 2094^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18372433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5416 + ... + 8128.

Almost surely, 2^18372436 is an apocalyptic number.

It is an amenable number.

18372436 is a deficient number, since it is larger than the sum of its proper divisors (13810176).

18372436 is a wasteful number, since it uses less digits than its factorization.

18372436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410 (or 4408 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 18372436 is about 4286.3079684036. The cubic root of 18372436 is about 263.8693300386.

The spelling of 18372436 in words is "eighteen million, three hundred seventy-two thousand, four hundred thirty-six".