18040963 has 4 divisors (see below), whose sum is σ = 18258408. Its totient is φ = 17823520.

The previous prime is 18040931. The next prime is 18040969. The reversal of 18040963 is 36904081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18040963 - 2⁵ = 18040931 is a prime.

It is a Smith number, since the sum of its digits (31) 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 (18040969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108598 + ... + 108763.

It is an arithmetic number, because the mean of its divisors is an integer number (4564602).

Almost surely, 2^18040963 is an apocalyptic number.

18040963 is a deficient number, since it is larger than the sum of its proper divisors (217445).

18040963 is an equidigital number, since it uses as much as digits as its factorization.

18040963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217444.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18040963 is about 4247.4654795537. The cubic root of 18040963 is about 262.2727914524.

The spelling of 18040963 in words is "eighteen million, forty thousand, nine hundred sixty-three".