18079247 has 4 divisors (see below), whose sum is σ = 18131400. Its totient is φ = 18027096.

The previous prime is 18079207. The next prime is 18079249. The reversal of 18079247 is 74297081.

18079247 is nontrivially palindromic in base 11.

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 18079247 - 2⁶ = 18079183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18079247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18079249) 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, 25553 + ... + 26250.

It is an arithmetic number, because the mean of its divisors is an integer number (4532850).

Almost surely, 2^18079247 is an apocalyptic number.

18079247 is a deficient number, since it is larger than the sum of its proper divisors (52153).

18079247 is an equidigital number, since it uses as much as digits as its factorization.

18079247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52152.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 18079247 is about 4251.9697788202. The cubic root of 18079247 is about 262.4581798835.

The spelling of 18079247 in words is "eighteen million, seventy-nine thousand, two hundred forty-seven".