18121088 has 32 divisors (see below), whose sum is σ = 36656760. Its totient is φ = 8921088.

The previous prime is 18121073. The next prime is 18121093. The reversal of 18121088 is 88012181.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 18121088.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7520 + ... + 9632.

Almost surely, 2^18121088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18121088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18328380).

18121088 is an abundant number, since it is smaller than the sum of its proper divisors (18535672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18121088 is an equidigital number, since it uses as much as digits as its factorization.

18121088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18121088 is about 4256.8871255884. The cubic root of 18121088 is about 262.6604938412.

The spelling of 18121088 in words is "eighteen million, one hundred twenty-one thousand, eighty-eight".