18212624 has 40 divisors (see below), whose sum is σ = 36997632. Its totient is φ = 8674560.

The previous prime is 18212617. The next prime is 18212629. The reversal of 18212624 is 42621281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18212593 and 18212602.

It is not an unprimeable number, because it can be changed into a prime (18212629) 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 7 ways as a sum of consecutive naturals, for example, 35957 + ... + 36459.

Almost surely, 2^18212624 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 18212624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18498816).

18212624 is an abundant number, since it is smaller than the sum of its proper divisors (18785008).

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

18212624 is a wasteful number, since it uses less digits than its factorization.

18212624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 609 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 18212624 is about 4267.6251006854. The cubic root of 18212624 is about 263.1020148130.

The spelling of 18212624 in words is "eighteen million, two hundred twelve thousand, six hundred twenty-four".