18267121 has 8 divisors (see below), whose sum is σ = 18641664. Its totient is φ = 17895120.

The previous prime is 18267097. The next prime is 18267127. The reversal of 18267121 is 12176281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18267121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18267121.

It is not an unprimeable number, because it can be changed into a prime (18267127) 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, 20736 + ... + 21598.

It is an arithmetic number, because the mean of its divisors is an integer number (2330208).

Almost surely, 2^18267121 is an apocalyptic number.

It is an amenable number.

18267121 is a deficient number, since it is larger than the sum of its proper divisors (374543).

18267121 is an equidigital number, since it uses as much as digits as its factorization.

18267121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271.

The product of its digits is 1344, while the sum is 28.

The square root of 18267121 is about 4274.0052643861. The cubic root of 18267121 is about 263.3641771630.

The spelling of 18267121 in words is "eighteen million, two hundred sixty-seven thousand, one hundred twenty-one".