13319999972 has 12 divisors (see below), whose sum is σ = 23312843820. Its totient is φ = 6659187456.

The previous prime is 13319999921. The next prime is 13320000007. The reversal of 13319999972 is 27999991331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4437691456 + 8882308516 = 66616^2 + 94246^2 .

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, 165473 + ... + 232424.

It is an arithmetic number, because the mean of its divisors is an integer number (1942736985).

Almost surely, 2^13319999972 is an apocalyptic number.

It is an amenable number.

13319999972 is a deficient number, since it is larger than the sum of its proper divisors (9992843848).

13319999972 is a wasteful number, since it uses less digits than its factorization.

13319999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406270 (or 406268 counting only the distinct ones).

The product of its digits is 7440174, while the sum is 62.

The spelling of 13319999972 in words is "thirteen billion, three hundred nineteen million, nine hundred ninety-nine thousand, nine hundred seventy-two".