18872744 has 16 divisors (see below), whose sum is σ = 38603520. Its totient is φ = 8578480.

The previous prime is 18872677. The next prime is 18872753. The reversal of 18872744 is 44727881.

Added to its reverse (44727881) it gives a square (63600625 = 7975²).

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107144 + ... + 107319.

It is an arithmetic number, because the mean of its divisors is an integer number (2412720).

Almost surely, 2^18872744 is an apocalyptic number.

It is an amenable number.

18872744 is an abundant number, since it is smaller than the sum of its proper divisors (19730776).

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

18872744 is a wasteful number, since it uses less digits than its factorization.

18872744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214480 (or 214476 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 18872744 is about 4344.2771550627. The cubic root of 18872744 is about 266.2430928285.

Adding to 18872744 its reverse (44727881), we get a square (63600625 = 7975²).

The spelling of 18872744 in words is "eighteen million, eight hundred seventy-two thousand, seven hundred forty-four".