18014521 has 8 divisors (see below), whose sum is σ = 20672064. Its totient is φ = 15378000.

The previous prime is 18014501. The next prime is 18014533. The reversal of 18014521 is 12541081.

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 18014521 - 2⁷ = 18014393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18014492 and 18014501.

It is not an unprimeable number, because it can be changed into a prime (18014501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3370 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (2584008).

Almost surely, 2^18014521 is an apocalyptic number.

It is an amenable number.

18014521 is a deficient number, since it is larger than the sum of its proper divisors (2657543).

18014521 is a wasteful number, since it uses less digits than its factorization.

18014521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 18014521 is about 4244.3516583808. The cubic root of 18014521 is about 262.1445941559.

The spelling of 18014521 in words is "eighteen million, fourteen thousand, five hundred twenty-one".