18426816 has 42 divisors (see below), whose sum is σ = 52818792. Its totient is φ = 6142080.

The previous prime is 18426781. The next prime is 18426817. The reversal of 18426816 is 61862481.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15420 + ... + 16571.

Almost surely, 2^18426816 is an apocalyptic number.

18426816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18426816 is an abundant number, since it is smaller than the sum of its proper divisors (34391976).

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

18426816 is a wasteful number, since it uses less digits than its factorization.

18426816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32009 (or 31996 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18426816 is about 4292.6467359893. The cubic root of 18426816 is about 264.1294131352.

It can be divided in two parts, 184 and 26816, that added together give a cube (27000 = 30³).

The spelling of 18426816 in words is "eighteen million, four hundred twenty-six thousand, eight hundred sixteen".