13042838981 has 2 divisors, whose sum is σ = 13042838982. Its totient is φ = 13042838980.

The previous prime is 13042838969. The next prime is 13042838987. The reversal of 13042838981 is 18983824031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9421808356 + 3621030625 = 97066^2 + 60175^2 .

It is a cyclic number.

It is not a de Polignac number, because 13042838981 - 2¹⁸ = 13042576837 is a prime.

It is a super-2 number, since 2×13042838981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13042838987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6521419490 + 6521419491.

It is an arithmetic number, because the mean of its divisors is an integer number (6521419491).

Almost surely, 2^13042838981 is an apocalyptic number.

It is an amenable number.

13042838981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13042838981 is an equidigital number, since it uses as much as digits as its factorization.

13042838981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 13042838981 in words is "thirteen billion, forty-two million, eight hundred thirty-eight thousand, nine hundred eighty-one".