18749144 has 8 divisors (see below), whose sum is σ = 35154660. Its totient is φ = 9374568.

The previous prime is 18749131. The next prime is 18749153. The reversal of 18749144 is 44194781.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×18749144³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18749098 and 18749107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1171814 + ... + 1171829.

Almost surely, 2^18749144 is an apocalyptic number.

It is an amenable number.

18749144 is a deficient number, since it is larger than the sum of its proper divisors (16405516).

18749144 is a wasteful number, since it uses less digits than its factorization.

18749144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343649 (or 2343645 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 18749144 is about 4330.0281754280. The cubic root of 18749144 is about 265.6605994086.

The spelling of 18749144 in words is "eighteen million, seven hundred forty-nine thousand, one hundred forty-four".