18744799 has 6 divisors (see below), whose sum is σ = 18885776. Its totient is φ = 18604620.

The previous prime is 18744731. The next prime is 18744823. The reversal of 18744799 is 99744781.

It is not a de Polignac number, because 18744799 - 2¹³ = 18736607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18744709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69034 + ... + 69304.

Almost surely, 2^18744799 is an apocalyptic number.

18744799 is a deficient number, since it is larger than the sum of its proper divisors (140977).

18744799 is an frugal number, since it uses more digits than its factorization.

18744799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 534 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 18744799 is about 4329.5264175196. The cubic root of 18744799 is about 265.6400760809.

The spelling of 18744799 in words is "eighteen million, seven hundred forty-four thousand, seven hundred ninety-nine".