18153121 has 8 divisors (see below), whose sum is σ = 20792000. Its totient is φ = 15525648.

The previous prime is 18153103. The next prime is 18153133. The reversal of 18153121 is 12135181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18153121 - 2⁹ = 18152609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18153092 and 18153101.

It is not an unprimeable number, because it can be changed into a prime (18103121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (2599000).

Almost surely, 2^18153121 is an apocalyptic number.

It is an amenable number.

18153121 is a deficient number, since it is larger than the sum of its proper divisors (2638879).

18153121 is an equidigital number, since it uses as much as digits as its factorization.

18153121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5703.

The product of its digits is 240, while the sum is 22.

The square root of 18153121 is about 4260.6479554171. The cubic root of 18153121 is about 262.8151727566.

The spelling of 18153121 in words is "eighteen million, one hundred fifty-three thousand, one hundred twenty-one".