21904358080444 has 24 divisors (see below), whose sum is σ = 44016340419968. Its totient is φ = 9343091121840.

The previous prime is 21904358080417. The next prime is 21904358080453. The reversal of 21904358080444 is 44408085340912.

It is a junction number, because it is equal to n+sod(n) for n = 21904358080391 and 21904358080400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853782014 + ... + 1853793829.

Almost surely, 2^{21904358080444} is an apocalyptic number.

It is an amenable number.

21904358080444 is an abundant number, since it is smaller than the sum of its proper divisors (22111982339524).

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

21904358080444 is a wasteful number, since it uses less digits than its factorization.

21904358080444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707576065 (or 3707576063 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 21904358080444 in words is "twenty-one trillion, nine hundred four billion, three hundred fifty-eight million, eighty thousand, four hundred forty-four".