18014321 has 8 divisors (see below), whose sum is σ = 19579560. Its totient is φ = 16474752.

The previous prime is 18014309. The next prime is 18014323. The reversal of 18014321 is 12341081.

It can be written as a sum of positive squares in 4 ways, for example, as 5340721 + 12673600 = 2311^2 + 3560^2 .

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 18014321 - 2⁶ = 18014257 is a prime.

It is a super-2 number, since 2×18014321² = 649031522182082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18014293 and 18014302.

It is not an unprimeable number, because it can be changed into a prime (18014323) 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, 4940 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (2447445).

Almost surely, 2^18014321 is an apocalyptic number.

It is an amenable number.

18014321 is a deficient number, since it is larger than the sum of its proper divisors (1565239).

18014321 is a wasteful number, since it uses less digits than its factorization.

18014321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12835.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18014321 is about 4244.3280975909. The cubic root of 18014321 is about 262.1436240290.

The spelling of 18014321 in words is "eighteen million, fourteen thousand, three hundred twenty-one".