13220031996 has 36 divisors (see below), whose sum is σ = 33965133384. Its totient is φ = 4334436000.

The previous prime is 13220031971. The next prime is 13220032073. The reversal of 13220031996 is 69913002231.

It is a happy number.

13220031996 is a `hidden beast` number, since 132 + 200 + 319 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13220031996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3007830 + ... + 3012221.

Almost surely, 2^13220031996 is an apocalyptic number.

It is an amenable number.

13220031996 is an abundant number, since it is smaller than the sum of its proper divisors (20745101388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220031996 is a wasteful number, since it uses less digits than its factorization.

13220031996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020122 (or 6020117 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 13220031996 in words is "thirteen billion, two hundred twenty million, thirty-one thousand, nine hundred ninety-six".