18042879 has 16 divisors (see below), whose sum is σ = 25344000. Its totient is φ = 11395296.

The previous prime is 18042859. The next prime is 18042887. The reversal of 18042879 is 97824081.

It is not a de Polignac number, because 18042879 - 2¹¹ = 18040831 is a prime.

It is a super-3 number, since 3×18042879³ (a number of 23 digits) contains 333 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6322 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (1584000).

Almost surely, 2^18042879 is an apocalyptic number.

18042879 is a deficient number, since it is larger than the sum of its proper divisors (7301121).

18042879 is a wasteful number, since it uses less digits than its factorization.

18042879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 18042879 is about 4247.6910198365. The cubic root of 18042879 is about 262.2820758215.

The spelling of 18042879 in words is "eighteen million, forty-two thousand, eight hundred seventy-nine".