13239926081 has 2 divisors, whose sum is σ = 13239926082. Its totient is φ = 13239926080.

The previous prime is 13239926071. The next prime is 13239926171. The reversal of 13239926081 is 18062993231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8445610000 + 4794316081 = 91900^2 + 69241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13239926081 is a prime.

It is a super-2 number, since 2×13239926081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13239926071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619963040 + 6619963041.

It is an arithmetic number, because the mean of its divisors is an integer number (6619963041).

Almost surely, 2^13239926081 is an apocalyptic number.

It is an amenable number.

13239926081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239926081 is an equidigital number, since it uses as much as digits as its factorization.

13239926081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 13239926081 in words is "thirteen billion, two hundred thirty-nine million, nine hundred twenty-six thousand, eighty-one".