18121048 has 32 divisors (see below), whose sum is σ = 39249360. Its totient is φ = 7751680.

The previous prime is 18121043. The next prime is 18121067. The reversal of 18121048 is 84012181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18121043) 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, 4561 + ... + 7552.

Almost surely, 2^18121048 is an apocalyptic number.

It is an amenable number.

18121048 is an abundant number, since it is smaller than the sum of its proper divisors (21128312).

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

18121048 is a wasteful number, since it uses less digits than its factorization.

18121048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12147 (or 12143 counting only the distinct ones).

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

The square root of 18121048 is about 4256.8824273170. The cubic root of 18121048 is about 262.6603005778.

The spelling of 18121048 in words is "eighteen million, one hundred twenty-one thousand, forty-eight".