18055479 has 32 divisors (see below), whose sum is σ = 27808704. Its totient is φ = 10321920.

The previous prime is 18055459. The next prime is 18055489. The reversal of 18055479 is 97455081.

It is not a de Polignac number, because 18055479 - 2⁵ = 18055447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18055409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74799 + ... + 75039.

It is an arithmetic number, because the mean of its divisors is an integer number (869022).

Almost surely, 2^18055479 is an apocalyptic number.

18055479 is a deficient number, since it is larger than the sum of its proper divisors (9753225).

18055479 is a wasteful number, since it uses less digits than its factorization.

18055479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 18055479 is about 4249.1739197166. The cubic root of 18055479 is about 262.3431153259.

The spelling of 18055479 in words is "eighteen million, fifty-five thousand, four hundred seventy-nine".