13250023981 has 2 divisors, whose sum is σ = 13250023982. Its totient is φ = 13250023980.

The previous prime is 13250023979. The next prime is 13250024071. The reversal of 13250023981 is 18932005231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12878845225 + 371178756 = 113485^2 + 19266^2 .

It is a cyclic number.

It is not a de Polignac number, because 13250023981 - 2¹ = 13250023979 is a prime.

It is a super-2 number, since 2×13250023981² (a number of 21 digits) contains 22 as substring.

Together with 13250023979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13250023181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6625011990 + 6625011991.

It is an arithmetic number, because the mean of its divisors is an integer number (6625011991).

Almost surely, 2^13250023981 is an apocalyptic number.

It is an amenable number.

13250023981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13250023981 is an equidigital number, since it uses as much as digits as its factorization.

13250023981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 13250023981 in words is "thirteen billion, two hundred fifty million, twenty-three thousand, nine hundred eighty-one".