21024636132413 has 2 divisors, whose sum is σ = 21024636132414. Its totient is φ = 21024636132412.

The previous prime is 21024636132407. The next prime is 21024636132431. The reversal of 21024636132413 is 31423163642012.

Together with next prime (21024636132431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16885376709124 + 4139259423289 = 4109182^2 + 2034517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21024636132413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21024636137413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512318066206 + 10512318066207.

It is an arithmetic number, because the mean of its divisors is an integer number (10512318066207).

Almost surely, 2^{21024636132413} is an apocalyptic number.

It is an amenable number.

21024636132413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024636132413 is an equidigital number, since it uses as much as digits as its factorization.

21024636132413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 21024636132413 its reverse (31423163642012), we get a palindrome (52447799774425).

The spelling of 21024636132413 in words is "twenty-one trillion, twenty-four billion, six hundred thirty-six million, one hundred thirty-two thousand, four hundred thirteen".