21408748875348 has 12 divisors (see below), whose sum is σ = 49953747375840. Its totient is φ = 7136249625112.

The previous prime is 21408748875341. The next prime is 21408748875359. The reversal of 21408748875348 is 84357884780412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21408748875348² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21408748875341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892031203128 + ... + 892031203151.

It is an arithmetic number, because the mean of its divisors is an integer number (4162812281320).

Almost surely, 2^{21408748875348} is an apocalyptic number.

It is an amenable number.

21408748875348 is an abundant number, since it is smaller than the sum of its proper divisors (28544998500492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21408748875348 is a wasteful number, since it uses less digits than its factorization.

21408748875348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784062406286 (or 1784062406284 counting only the distinct ones).

The product of its (nonzero) digits is 385351680, while the sum is 69.

The spelling of 21408748875348 in words is "twenty-one trillion, four hundred eight billion, seven hundred forty-eight million, eight hundred seventy-five thousand, three hundred forty-eight".