21408748875341 has 2 divisors, whose sum is σ = 21408748875342. Its totient is φ = 21408748875340.

The previous prime is 21408748875313. The next prime is 21408748875359. The reversal of 21408748875341 is 14357884780412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20756716850116 + 652032025225 = 4555954^2 + 807485^2 .

It is a cyclic number.

It is not a de Polignac number, because 21408748875341 - 2²⁶ = 21408681766477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21408748875541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10704374437670 + 10704374437671.

It is an arithmetic number, because the mean of its divisors is an integer number (10704374437671).

Almost surely, 2^{21408748875341} is an apocalyptic number.

It is an amenable number.

21408748875341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21408748875341 is an equidigital number, since it uses as much as digits as its factorization.

21408748875341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48168960, while the sum is 62.

The spelling of 21408748875341 in words is "twenty-one trillion, four hundred eight billion, seven hundred forty-eight million, eight hundred seventy-five thousand, three hundred forty-one".