21408748875359 has 2 divisors, whose sum is σ = 21408748875360. Its totient is φ = 21408748875358.

The previous prime is 21408748875341. The next prime is 21408748875383. The reversal of 21408748875359 is 95357884780412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21408748875359 - 2²⁰ = 21408747826783 is a prime.

It is a super-3 number, since 3×21408748875359³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21408748875292 and 21408748875301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21408748875859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10704374437679 + 10704374437680.

It is an arithmetic number, because the mean of its divisors is an integer number (10704374437680).

Almost surely, 2^{21408748875359} is an apocalyptic number.

21408748875359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21408748875359 is an equidigital number, since it uses as much as digits as its factorization.

21408748875359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 541900800, while the sum is 71.

The spelling of 21408748875359 in words is "twenty-one trillion, four hundred eight billion, seven hundred forty-eight million, eight hundred seventy-five thousand, three hundred fifty-nine".