18579479 has 4 divisors (see below), whose sum is σ = 18589584. Its totient is φ = 18569376.

The previous prime is 18579461. The next prime is 18579481. The reversal of 18579479 is 97497581.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18579479 is a prime.

It is a super-2 number, since 2×18579479² = 690394079822882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18579499) 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, 1427 + ... + 6260.

It is an arithmetic number, because the mean of its divisors is an integer number (4647396).

Almost surely, 2^18579479 is an apocalyptic number.

18579479 is a deficient number, since it is larger than the sum of its proper divisors (10105).

18579479 is an equidigital number, since it uses as much as digits as its factorization.

18579479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104.

The product of its digits is 635040, while the sum is 50.

The square root of 18579479 is about 4310.3919775352. The cubic root of 18579479 is about 264.8568302236.

The spelling of 18579479 in words is "eighteen million, five hundred seventy-nine thousand, four hundred seventy-nine".