21260334413 has 2 divisors, whose sum is σ = 21260334414. Its totient is φ = 21260334412.

The previous prime is 21260334379. The next prime is 21260334437. The reversal of 21260334413 is 31443306212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21258223204 + 2111209 = 145802^2 + 1453^2 .

It is a cyclic number.

It is not a de Polignac number, because 21260334413 - 2⁸ = 21260334157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21260339413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630167206 + 10630167207.

It is an arithmetic number, because the mean of its divisors is an integer number (10630167207).

Almost surely, 2^21260334413 is an apocalyptic number.

It is an amenable number.

21260334413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21260334413 is an equidigital number, since it uses as much as digits as its factorization.

21260334413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 21260334413 in words is "twenty-one billion, two hundred sixty million, three hundred thirty-four thousand, four hundred thirteen".