13190742721 has 4 divisors (see below), whose sum is σ = 14205415252. Its totient is φ = 12176070192.

The previous prime is 13190742709. The next prime is 13190742743. The reversal of 13190742721 is 12724709131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6042885696 + 7147857025 = 77736^2 + 84545^2 .

It is not a de Polignac number, because 13190742721 - 2²⁷ = 13056524993 is a prime.

It is a super-2 number, since 2×13190742721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13190742751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507336246 + ... + 507336271.

It is an arithmetic number, because the mean of its divisors is an integer number (3551353813).

Almost surely, 2^13190742721 is an apocalyptic number.

It is an amenable number.

13190742721 is a deficient number, since it is larger than the sum of its proper divisors (1014672531).

13190742721 is a wasteful number, since it uses less digits than its factorization.

13190742721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014672530.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 13190742721 in words is "thirteen billion, one hundred ninety million, seven hundred forty-two thousand, seven hundred twenty-one".