21851081263092 has 24 divisors (see below), whose sum is σ = 52630561322752. Its totient is φ = 7048735891200.

The previous prime is 21851081263027. The next prime is 21851081263111. The reversal of 21851081263092 is 29036218015812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29369732509 + ... + 29369733252.

Almost surely, 2^{21851081263092} is an apocalyptic number.

It is an amenable number.

21851081263092 is an abundant number, since it is smaller than the sum of its proper divisors (30779480059660).

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

21851081263092 is a wasteful number, since it uses less digits than its factorization.

21851081263092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58739465799 (or 58739465797 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 21851081263092 in words is "twenty-one trillion, eight hundred fifty-one billion, eighty-one million, two hundred sixty-three thousand, ninety-two".