13821137312 has 24 divisors (see below), whose sum is σ = 27221166756. Its totient is φ = 6907825152.

The previous prime is 13821137279. The next prime is 13821137327. The reversal of 13821137312 is 21373112831.

It can be written as a sum of positive squares in 2 ways, for example, as 13671221776 + 149915536 = 116924^2 + 12244^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2633 + ... + 166280.

Almost surely, 2^13821137312 is an apocalyptic number.

It is an amenable number.

13821137312 is a deficient number, since it is larger than the sum of its proper divisors (13400029444).

13821137312 is a wasteful number, since it uses less digits than its factorization.

13821137312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171480 (or 171472 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The spelling of 13821137312 in words is "thirteen billion, eight hundred twenty-one million, one hundred thirty-seven thousand, three hundred twelve".