13213918516 has 24 divisors (see below), whose sum is σ = 24081571584. Its totient is φ = 6337242240.

The previous prime is 13213918499. The next prime is 13213918519. The reversal of 13213918516 is 61581931231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213918519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457510 + ... + 485533.

It is an arithmetic number, because the mean of its divisors is an integer number (1003398816).

Almost surely, 2^13213918516 is an apocalyptic number.

It is an amenable number.

13213918516 is a deficient number, since it is larger than the sum of its proper divisors (10867653068).

13213918516 is a wasteful number, since it uses less digits than its factorization.

13213918516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943191 (or 943189 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The spelling of 13213918516 in words is "thirteen billion, two hundred thirteen million, nine hundred eighteen thousand, five hundred sixteen".