18121084 has 6 divisors (see below), whose sum is σ = 31711904. Its totient is φ = 9060540.

The previous prime is 18121073. The next prime is 18121093. The reversal of 18121084 is 48012181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265132 + ... + 2265139.

Almost surely, 2^18121084 is an apocalyptic number.

It is an amenable number.

18121084 is a deficient number, since it is larger than the sum of its proper divisors (13590820).

18121084 is a wasteful number, since it uses less digits than its factorization.

18121084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530275 (or 4530273 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18121084 is about 4256.8866557615. The cubic root of 18121084 is about 262.6604745148.

The spelling of 18121084 in words is "eighteen million, one hundred twenty-one thousand, eighty-four".