18121952 has 12 divisors (see below), whose sum is σ = 35677656. Its totient is φ = 9060960.

The previous prime is 18121921. The next prime is 18121973. The reversal of 18121952 is 25912181.

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, 283124 + ... + 283187.

It is an arithmetic number, because the mean of its divisors is an integer number (2973138).

Almost surely, 2^18121952 is an apocalyptic number.

It is an amenable number.

18121952 is a deficient number, since it is larger than the sum of its proper divisors (17555704).

18121952 is an equidigital number, since it uses as much as digits as its factorization.

18121952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566321 (or 566313 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 18121952 is about 4256.9886069850. The cubic root of 18121952 is about 262.6646682605.

The spelling of 18121952 in words is "eighteen million, one hundred twenty-one thousand, nine hundred fifty-two".