18965372503 has 16 divisors (see below), whose sum is σ = 23739367680. Its totient is φ = 14719320000.

The previous prime is 18965372477. The next prime is 18965372509. The reversal of 18965372503 is 30527356981.

It is not a de Polignac number, because 18965372503 - 2²⁵ = 18931818071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18965372509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471318 + ... + 509971.

It is an arithmetic number, because the mean of its divisors is an integer number (1483710480).

Almost surely, 2^18965372503 is an apocalyptic number.

18965372503 is a deficient number, since it is larger than the sum of its proper divisors (4773995177).

18965372503 is a wasteful number, since it uses less digits than its factorization.

18965372503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981558.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 18965372503 in words is "eighteen billion, nine hundred sixty-five million, three hundred seventy-two thousand, five hundred three".