18944472 has 32 divisors (see below), whose sum is σ = 48890880. Its totient is φ = 6110880.

The previous prime is 18944459. The next prime is 18944473. The reversal of 18944472 is 27444981.

It is a self number, because there is not a number n which added to its sum of digits gives 18944472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11988 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (1527840).

Almost surely, 2^18944472 is an apocalyptic number.

18944472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18944472 is an abundant number, since it is smaller than the sum of its proper divisors (29946408).

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

18944472 is a wasteful number, since it uses less digits than its factorization.

18944472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25503 (or 25499 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18944472 is about 4352.5247845360. The cubic root of 18944472 is about 266.5799620895.

The spelling of 18944472 in words is "eighteen million, nine hundred forty-four thousand, four hundred seventy-two".