21871048081350 has 96 divisors (see below), whose sum is σ = 58832756962560. Its totient is φ = 5344911296640.

The previous prime is 21871048081349. The next prime is 21871048081361. The reversal of 21871048081350 is 5318084017812.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21871048081350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40073994 + ... + 40616093.

It is an arithmetic number, because the mean of its divisors is an integer number (612841218360).

Almost surely, 2^{21871048081350} is an apocalyptic number.

21871048081350 is an abundant number, since it is smaller than the sum of its proper divisors (36961708881210).

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

21871048081350 is a wasteful number, since it uses less digits than its factorization.

21871048081350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80690254 (or 80690249 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 48.

The spelling of 21871048081350 in words is "twenty-one trillion, eight hundred seventy-one billion, forty-eight million, eighty-one thousand, three hundred fifty".