12693524381 has 2 divisors, whose sum is σ = 12693524382. Its totient is φ = 12693524380.

The previous prime is 12693524357. The next prime is 12693524447. The reversal of 12693524381 is 18342539621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10657258756 + 2036265625 = 103234^2 + 45125^2 .

It is a cyclic number.

It is not a de Polignac number, because 12693524381 - 2¹⁸ = 12693262237 is a prime.

It is a super-2 number, since 2×12693524381² (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 (12693524321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6346762190 + 6346762191.

It is an arithmetic number, because the mean of its divisors is an integer number (6346762191).

Almost surely, 2^12693524381 is an apocalyptic number.

It is an amenable number.

12693524381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12693524381 is an equidigital number, since it uses as much as digits as its factorization.

12693524381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The spelling of 12693524381 in words is "twelve billion, six hundred ninety-three million, five hundred twenty-four thousand, three hundred eighty-one".