18844479 has 12 divisors (see below), whose sum is σ = 27490632. Its totient is φ = 12438000.

The previous prime is 18844471. The next prime is 18844489. The reversal of 18844479 is 97444881.

It is not a de Polignac number, because 18844479 - 2³ = 18844471 is a prime.

It is a super-2 number, since 2×18844479² = 710228777562882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18844471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9457 + ... + 11274.

It is an arithmetic number, because the mean of its divisors is an integer number (2290886).

Almost surely, 2^18844479 is an apocalyptic number.

18844479 is a deficient number, since it is larger than the sum of its proper divisors (8646153).

18844479 is a wasteful number, since it uses less digits than its factorization.

18844479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20838 (or 20835 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18844479 is about 4341.0228057452. The cubic root of 18844479 is about 266.1101123256.

The spelling of 18844479 in words is "eighteen million, eight hundred forty-four thousand, four hundred seventy-nine".