18227479 has 8 divisors (see below), whose sum is σ = 19237680. Its totient is φ = 17222400.

The previous prime is 18227449. The next prime is 18227483. The reversal of 18227479 is 97472281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18227479 - 2²¹ = 16130327 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 (18227449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7719 + ... + 9799.

It is an arithmetic number, because the mean of its divisors is an integer number (2404710).

Almost surely, 2^18227479 is an apocalyptic number.

18227479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18227479 is a deficient number, since it is larger than the sum of its proper divisors (1010201).

18227479 is a wasteful number, since it uses less digits than its factorization.

18227479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561.

The product of its digits is 56448, while the sum is 40.

The square root of 18227479 is about 4269.3651752925. The cubic root of 18227479 is about 263.1735278158.

The spelling of 18227479 in words is "eighteen million, two hundred twenty-seven thousand, four hundred seventy-nine".