18744959 has 4 divisors (see below), whose sum is σ = 18938304. Its totient is φ = 18551616.

The previous prime is 18744941. The next prime is 18744983. The reversal of 18744959 is 95944781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18744959 - 2⁸ = 18744703 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 (18744919) 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, 96527 + ... + 96720.

It is an arithmetic number, because the mean of its divisors is an integer number (4734576).

Almost surely, 2^18744959 is an apocalyptic number.

18744959 is a deficient number, since it is larger than the sum of its proper divisors (193345).

18744959 is an equidigital number, since it uses as much as digits as its factorization.

18744959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193344.

The product of its digits is 362880, while the sum is 47.

The square root of 18744959 is about 4329.5448952517. The cubic root of 18744959 is about 265.6408318868.

The spelling of 18744959 in words is "eighteen million, seven hundred forty-four thousand, nine hundred fifty-nine".