18479999 has 8 divisors (see below), whose sum is σ = 19202688. Its totient is φ = 17765280.

The previous prime is 18479959. The next prime is 18480001. The reversal of 18479999 is 99997481.

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 18479999 - 2⁸ = 18479743 is a prime.

It is a super-3 number, since 3×18479999³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

18479999 is a modest number, since divided by 9999 gives 1847 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18479939) 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, 2969 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (2400336).

Almost surely, 2^18479999 is an apocalyptic number.

18479999 is a deficient number, since it is larger than the sum of its proper divisors (722689).

18479999 is a wasteful number, since it uses less digits than its factorization.

18479999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985.

The product of its digits is 1469664, while the sum is 56.

The square root of 18479999 is about 4298.8369357304. The cubic root of 18479999 is about 264.3832768880.

The spelling of 18479999 in words is "eighteen million, four hundred seventy-nine thousand, nine hundred ninety-nine".