18279121 has 8 divisors (see below), whose sum is σ = 21990080. Its totient is φ = 14843088.

The previous prime is 18279113. The next prime is 18279133. The reversal of 18279121 is 12197281.

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 18279121 - 2³ = 18279113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18279161) 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 7 ways as a sum of consecutive naturals, for example, 68586 + ... + 68851.

It is an arithmetic number, because the mean of its divisors is an integer number (2748760).

Almost surely, 2^18279121 is an apocalyptic number.

It is an amenable number.

18279121 is a deficient number, since it is larger than the sum of its proper divisors (3710959).

18279121 is a wasteful number, since it uses less digits than its factorization.

18279121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137463.

The product of its digits is 2016, while the sum is 31.

The square root of 18279121 is about 4275.4088693364. The cubic root of 18279121 is about 263.4218340929.

The spelling of 18279121 in words is "eighteen million, two hundred seventy-nine thousand, one hundred twenty-one".