18873744 has 20 divisors (see below), whose sum is σ = 48757296. Its totient is φ = 6291232.

The previous prime is 18873727. The next prime is 18873749. The reversal of 18873744 is 44737881.

It is a junction number, because it is equal to n+sod(n) for n = 18873696 and 18873705.

It is not an unprimeable number, because it can be changed into a prime (18873749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196554 + ... + 196649.

Almost surely, 2^18873744 is an apocalyptic number.

It is an amenable number.

18873744 is an abundant number, since it is smaller than the sum of its proper divisors (29883552).

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

18873744 is a wasteful number, since it uses less digits than its factorization.

18873744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393214 (or 393208 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 18873744 is about 4344.3922474841. The cubic root of 18873744 is about 266.2477951723.

The spelling of 18873744 in words is "eighteen million, eight hundred seventy-three thousand, seven hundred forty-four".