18816044 has 24 divisors (see below), whose sum is σ = 36067920. Its totient is φ = 8535744.

The previous prime is 18816029. The next prime is 18816073. The reversal of 18816044 is 44061881.

It is a self number, because there is not a number n which added to its sum of digits gives 18816044.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2 + ... + 6134.

It is an arithmetic number, because the mean of its divisors is an integer number (1502830).

Almost surely, 2^18816044 is an apocalyptic number.

It is an amenable number.

18816044 is a deficient number, since it is larger than the sum of its proper divisors (17251876).

18816044 is a wasteful number, since it uses less digits than its factorization.

18816044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209 (or 6207 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18816044 is about 4337.7464195132. The cubic root of 18816044 is about 265.9761977684.

The spelling of 18816044 in words is "eighteen million, eight hundred sixteen thousand, forty-four".