12467453981 has 2 divisors, whose sum is σ = 12467453982. Its totient is φ = 12467453980.

The previous prime is 12467453909. The next prime is 12467454007. The reversal of 12467453981 is 18935476421.

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., 6870917881 + 5596536100 = 82891^2 + 74810^2 .

It is a cyclic number.

It is not a de Polignac number, because 12467453981 - 2³⁰ = 11393712157 is a prime.

It is a super-2 number, since 2×12467453981² (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 (12467453381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6233726990 + 6233726991.

It is an arithmetic number, because the mean of its divisors is an integer number (6233726991).

Almost surely, 2^12467453981 is an apocalyptic number.

It is an amenable number.

12467453981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12467453981 is an equidigital number, since it uses as much as digits as its factorization.

12467453981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The spelling of 12467453981 in words is "twelve billion, four hundred sixty-seven million, four hundred fifty-three thousand, nine hundred eighty-one".