13260021736 has 32 divisors (see below), whose sum is σ = 26816184360. Its totient is φ = 6110606592.

The previous prime is 13260021721. The next prime is 13260021751. The reversal of 13260021736 is 63712006231.

It is an interprime number because it is at equal distance from previous prime (13260021721) and next prime (13260021751).

It can be written as a sum of positive squares in 4 ways, for example, as 6289441636 + 6970580100 = 79306^2 + 83490^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13260021698 and 13260021707.

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, 29715 + ... + 165538.

Almost surely, 2^13260021736 is an apocalyptic number.

It is an amenable number.

13260021736 is an abundant number, since it is smaller than the sum of its proper divisors (13556162624).

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

13260021736 is a wasteful number, since it uses less digits than its factorization.

13260021736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195925 (or 195921 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 13260021736 its reverse (63712006231), we get a palindrome (76972027967).

The spelling of 13260021736 in words is "thirteen billion, two hundred sixty million, twenty-one thousand, seven hundred thirty-six".