18013626 has 24 divisors (see below), whose sum is σ = 39567060. Its totient is φ = 5921856.

The previous prime is 18013621. The next prime is 18013651. The reversal of 18013626 is 62631081.

It can be written as a sum of positive squares in 2 ways, for example, as 17015625 + 998001 = 4125^2 + 999^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18013626.

It is not an unprimeable number, because it can be changed into a prime (18013621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5541 + ... + 8168.

Almost surely, 2^18013626 is an apocalyptic number.

18013626 is an abundant number, since it is smaller than the sum of its proper divisors (21553434).

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

18013626 is a wasteful number, since it uses less digits than its factorization.

18013626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13790 (or 13787 counting only the distinct ones).

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

The square root of 18013626 is about 4244.2462228292. The cubic root of 18013626 is about 262.1402527823.

The spelling of 18013626 in words is "eighteen million, thirteen thousand, six hundred twenty-six".