18520963303 has 16 divisors (see below), whose sum is σ = 19595520000. Its totient is φ = 17476568032.

The previous prime is 18520963297. The next prime is 18520963313. The reversal of 18520963303 is 30336902581.

It is a cyclic number.

It is not a de Polignac number, because 18520963303 - 2⁵ = 18520963271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520963313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970548 + ... + 989446.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720000).

Almost surely, 2^18520963303 is an apocalyptic number.

18520963303 is a deficient number, since it is larger than the sum of its proper divisors (1074556697).

18520963303 is a wasteful number, since it uses less digits than its factorization.

18520963303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19694.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 18520963303 in words is "eighteen billion, five hundred twenty million, nine hundred sixty-three thousand, three hundred three".