18026479 has 4 divisors (see below), whose sum is σ = 18053784. Its totient is φ = 17999176.

The previous prime is 18026471. The next prime is 18026509. The reversal of 18026479 is 97462081.

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 18026479 - 2³ = 18026471 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 (18026471) 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, 12637 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (4513446).

Almost surely, 2^18026479 is an apocalyptic number.

18026479 is a deficient number, since it is larger than the sum of its proper divisors (27305).

18026479 is an equidigital number, since it uses as much as digits as its factorization.

18026479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27304.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 18026479 is about 4245.7601204025. The cubic root of 18026479 is about 262.2025849975.

It can be divided in two parts, 1802 and 6479, that added together give a square (8281 = 91²).

The spelling of 18026479 in words is "eighteen million, twenty-six thousand, four hundred seventy-nine".