18479121 has 8 divisors (see below), whose sum is σ = 25212000. Its totient is φ = 12032832.

The previous prime is 18479117. The next prime is 18479137. The reversal of 18479121 is 12197481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18479121 - 2² = 18479117 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18479521) 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 7 ways as a sum of consecutive naturals, for example, 71496 + ... + 71753.

It is an arithmetic number, because the mean of its divisors is an integer number (3151500).

Almost surely, 2^18479121 is an apocalyptic number.

It is an amenable number.

18479121 is a deficient number, since it is larger than the sum of its proper divisors (6732879).

18479121 is a wasteful number, since it uses less digits than its factorization.

18479121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143295.

The product of its digits is 4032, while the sum is 33.

The square root of 18479121 is about 4298.7348138726. The cubic root of 18479121 is about 264.3790897992.

The spelling of 18479121 in words is "eighteen million, four hundred seventy-nine thousand, one hundred twenty-one".