21548146882128 has 20 divisors (see below), whose sum is σ = 55666046112288. Its totient is φ = 7182715627360.

The previous prime is 21548146882117. The next prime is 21548146882151. The reversal of 21548146882128 is 82128864184512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224459863308 + ... + 224459863403.

Almost surely, 2^{21548146882128} is an apocalyptic number.

It is an amenable number.

21548146882128 is an abundant number, since it is smaller than the sum of its proper divisors (34117899230160).

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

21548146882128 is a wasteful number, since it uses less digits than its factorization.

21548146882128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448919726722 (or 448919726716 counting only the distinct ones).

The product of its digits is 15728640, while the sum is 60.

The spelling of 21548146882128 in words is "twenty-one trillion, five hundred forty-eight billion, one hundred forty-six million, eight hundred eighty-two thousand, one hundred twenty-eight".