18793944 has 160 divisors (see below), whose sum is σ = 59764320. Its totient is φ = 5474304.

The previous prime is 18793933. The next prime is 18793961. The reversal of 18793944 is 44939781.

It is a self number, because there is not a number n which added to its sum of digits gives 18793944.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 193704 + ... + 193800.

It is an arithmetic number, because the mean of its divisors is an integer number (373527).

Almost surely, 2^18793944 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 18793944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29882160).

18793944 is an abundant number, since it is smaller than the sum of its proper divisors (40970376).

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

18793944 is a wasteful number, since it uses less digits than its factorization.

18793944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 138 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 18793944 is about 4335.1982653623. The cubic root of 18793944 is about 265.8720246702.

The spelling of 18793944 in words is "eighteen million, seven hundred ninety-three thousand, nine hundred forty-four".