18612036 has 72 divisors (see below), whose sum is σ = 49172760. Its totient is φ = 5930496.

The previous prime is 18612029. The next prime is 18612043. The reversal of 18612036 is 63021681.

18612036 is a `hidden beast` number, since 18 + 612 + 0 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (18612029) and next prime (18612043).

It can be written as a sum of positive squares in 4 ways, for example, as 2160900 + 16451136 = 1470^2 + 4056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118470 + ... + 118626.

It is an arithmetic number, because the mean of its divisors is an integer number (682955).

Almost surely, 2^18612036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18612036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24586380).

18612036 is an abundant number, since it is smaller than the sum of its proper divisors (30560724).

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

18612036 is a wasteful number, since it uses less digits than its factorization.

18612036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18612036 is about 4314.1668952418. The cubic root of 18612036 is about 265.0114436734.

The spelling of 18612036 in words is "eighteen million, six hundred twelve thousand, thirty-six".