13468147981 has 2 divisors, whose sum is σ = 13468147982. Its totient is φ = 13468147980.

The previous prime is 13468147961. The next prime is 13468148003. The reversal of 13468147981 is 18974186431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9532593225 + 3935554756 = 97635^2 + 62734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13468147981 is a prime.

It is a super-2 number, since 2×13468147981² (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 (13468147961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734073990 + 6734073991.

It is an arithmetic number, because the mean of its divisors is an integer number (6734073991).

Almost surely, 2^13468147981 is an apocalyptic number.

It is an amenable number.

13468147981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13468147981 is an equidigital number, since it uses as much as digits as its factorization.

13468147981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The spelling of 13468147981 in words is "thirteen billion, four hundred sixty-eight million, one hundred forty-seven thousand, nine hundred eighty-one".