13250505320 has 32 divisors (see below), whose sum is σ = 32106994920. Its totient is φ = 4892494080.

The previous prime is 13250505319. The next prime is 13250505371. The reversal of 13250505320 is 2350505231.

It can be written as a sum of positive squares in 4 ways, for example, as 8218872964 + 5031632356 = 90658^2 + 70934^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 13250505320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12740351 + ... + 12741390.

Almost surely, 2^13250505320 is an apocalyptic number.

13250505320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13250505320 is an abundant number, since it is smaller than the sum of its proper divisors (18856489600).

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

13250505320 is a wasteful number, since it uses less digits than its factorization.

13250505320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25481765 (or 25481761 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The spelling of 13250505320 in words is "thirteen billion, two hundred fifty million, five hundred five thousand, three hundred twenty".