18371121 has 8 divisors (see below), whose sum is σ = 24747744. Its totient is φ = 12120960.

The previous prime is 18371117. The next prime is 18371167. The reversal of 18371121 is 12117381.

It is a happy number.

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

It is not a de Polignac number, because 18371121 - 2² = 18371117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18371091 and 18371100.

It is not an unprimeable number, because it can be changed into a prime (18371021) 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, 31275 + ... + 31856.

It is an arithmetic number, because the mean of its divisors is an integer number (3093468).

Almost surely, 2^18371121 is an apocalyptic number.

It is an amenable number.

18371121 is a deficient number, since it is larger than the sum of its proper divisors (6376623).

18371121 is an equidigital number, since it uses as much as digits as its factorization.

18371121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63231.

The product of its digits is 336, while the sum is 24.

The square root of 18371121 is about 4286.1545702413. The cubic root of 18371121 is about 263.8630344400.

The spelling of 18371121 in words is "eighteen million, three hundred seventy-one thousand, one hundred twenty-one".