18127479 has 4 divisors (see below), whose sum is σ = 24169976. Its totient is φ = 12084984.

The previous prime is 18127469. The next prime is 18127493. The reversal of 18127479 is 97472181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97472181 = 3 ⋅32490727.

It is not a de Polignac number, because 18127479 - 2¹¹ = 18125431 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 (18127469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3021244 + ... + 3021249.

It is an arithmetic number, because the mean of its divisors is an integer number (6042494).

Almost surely, 2^18127479 is an apocalyptic number.

18127479 is a deficient number, since it is larger than the sum of its proper divisors (6042497).

18127479 is an equidigital number, since it uses as much as digits as its factorization.

18127479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6042496.

The product of its digits is 28224, while the sum is 39.

The square root of 18127479 is about 4257.6377253120. The cubic root of 18127479 is about 262.6913688436.

The spelling of 18127479 in words is "eighteen million, one hundred twenty-seven thousand, four hundred seventy-nine".