18016465 has 16 divisors (see below), whose sum is σ = 22896000. Its totient is φ = 13571712.

The previous prime is 18016433. The next prime is 18016469. The reversal of 18016465 is 56461081.

It is a cyclic number.

It is not a de Polignac number, because 18016465 - 2⁵ = 18016433 is a prime.

It is a super-2 number, since 2×18016465² = 649186022192450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18016469) 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 15 ways as a sum of consecutive naturals, for example, 18429 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (1431000).

Almost surely, 2^18016465 is an apocalyptic number.

It is an amenable number.

18016465 is a deficient number, since it is larger than the sum of its proper divisors (4879535).

18016465 is a wasteful number, since it uses less digits than its factorization.

18016465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18016465 is about 4244.5806624448. The cubic root of 18016465 is about 262.1540234150.

It can be divided in two parts, 18016 and 465, that added together give a palindrome (18481).

The spelling of 18016465 in words is "eighteen million, sixteen thousand, four hundred sixty-five".