18910344 has 32 divisors (see below), whose sum is σ = 47769120. Its totient is φ = 6237696.

The previous prime is 18910327. The next prime is 18910351. The reversal of 18910344 is 44301981.

It is a happy number.

It is a super-2 number, since 2×18910344² = 715202220396672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (1492785).

Almost surely, 2^18910344 is an apocalyptic number.

It is an amenable number.

18910344 is an abundant number, since it is smaller than the sum of its proper divisors (28858776).

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

18910344 is a wasteful number, since it uses less digits than its factorization.

18910344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229 (or 8225 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18910344 is about 4348.6025341482. The cubic root of 18910344 is about 266.4197867870.

The spelling of 18910344 in words is "eighteen million, nine hundred ten thousand, three hundred forty-four".