13218709503 has 16 divisors (see below), whose sum is σ = 18119214720. Its totient is φ = 8565810336.

The previous prime is 13218709463. The next prime is 13218709513. The reversal of 13218709503 is 30590781231.

It is not a de Polignac number, because 13218709503 - 2¹² = 13218705407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218709513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54676 + ... + 171542.

It is an arithmetic number, because the mean of its divisors is an integer number (1132450920).

Almost surely, 2^13218709503 is an apocalyptic number.

13218709503 is a deficient number, since it is larger than the sum of its proper divisors (4900505217).

13218709503 is a wasteful number, since it uses less digits than its factorization.

13218709503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117926.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 13218709503 in words is "thirteen billion, two hundred eighteen million, seven hundred nine thousand, five hundred three".