18719044 has 6 divisors (see below), whose sum is σ = 32758334. Its totient is φ = 9359520.

The previous prime is 18719039. The next prime is 18719053. The reversal of 18719044 is 44091781.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 56644 = 4320^2 + 238^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2339877 + ... + 2339884.

Almost surely, 2^18719044 is an apocalyptic number.

It is an amenable number.

18719044 is a deficient number, since it is larger than the sum of its proper divisors (14039290).

18719044 is a wasteful number, since it uses less digits than its factorization.

18719044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679765 (or 4679763 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18719044 is about 4326.5510513572. The cubic root of 18719044 is about 265.5183588347.

The spelling of 18719044 in words is "eighteen million, seven hundred nineteen thousand, forty-four".