18914665 has 32 divisors (see below), whose sum is σ = 28728576. Its totient is φ = 11612160.

The previous prime is 18914663. The next prime is 18914669. The reversal of 18914665 is 56641981.

It is not a de Polignac number, because 18914665 - 2¹ = 18914663 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18914663) 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 31 ways as a sum of consecutive naturals, for example, 27769 + ... + 28441.

It is an arithmetic number, because the mean of its divisors is an integer number (897768).

Almost surely, 2^18914665 is an apocalyptic number.

It is an amenable number.

18914665 is a deficient number, since it is larger than the sum of its proper divisors (9813911).

18914665 is a wasteful number, since it uses less digits than its factorization.

18914665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its digits is 51840, while the sum is 40.

The square root of 18914665 is about 4349.0993320457. The cubic root of 18914665 is about 266.4400774848.

It can be divided in two parts, 1891 and 4665, that added together give a palindrome (6556).

The spelling of 18914665 in words is "eighteen million, nine hundred fourteen thousand, six hundred sixty-five".