13250821069 has 4 divisors (see below), whose sum is σ = 13262770620. Its totient is φ = 13238871520.

The previous prime is 13250821049. The next prime is 13250821079. The reversal of 13250821069 is 96012805231.

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 914276169 + 12336544900 = 30237^2 + 111070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13250821069 is a prime.

It is a super-2 number, since 2×13250821069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13250821049) 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, 5973112 + ... + 5975329.

It is an arithmetic number, because the mean of its divisors is an integer number (3315692655).

Almost surely, 2^13250821069 is an apocalyptic number.

It is an amenable number.

13250821069 is a deficient number, since it is larger than the sum of its proper divisors (11949551).

13250821069 is a wasteful number, since it uses less digits than its factorization.

13250821069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949550.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 13250821069 in words is "thirteen billion, two hundred fifty million, eight hundred twenty-one thousand, sixty-nine".