18121082 has 48 divisors (see below), whose sum is σ = 34165800. Its totient is φ = 7160832.

The previous prime is 18121073. The next prime is 18121093. The reversal of 18121082 is 28012181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14984641 + 3136441 = 3871^2 + 1771^2 .

It is a super-2 number, since 2×18121082² = 656747225701448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121544 + ... + 121692.

Almost surely, 2^18121082 is an apocalyptic number.

18121082 is a deficient number, since it is larger than the sum of its proper divisors (16044718).

18121082 is a wasteful number, since it uses less digits than its factorization.

18121082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 18121082 is about 4256.8864208480. The cubic root of 18121082 is about 262.6604648517.

The spelling of 18121082 in words is "eighteen million, one hundred twenty-one thousand, eighty-two".