21676444512 has 48 divisors (see below), whose sum is σ = 57195537840. Its totient is φ = 7188037632.

The previous prime is 21676444499. The next prime is 21676444547. The reversal of 21676444512 is 21544467612.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566437 + ... + 603492.

It is an arithmetic number, because the mean of its divisors is an integer number (1191573705).

Almost surely, 2^21676444512 is an apocalyptic number.

It is an amenable number.

21676444512 is an abundant number, since it is smaller than the sum of its proper divisors (35519093328).

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

21676444512 is a wasteful number, since it uses less digits than its factorization.

21676444512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170135 (or 1170127 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The spelling of 21676444512 in words is "twenty-one billion, six hundred seventy-six million, four hundred forty-four thousand, five hundred twelve".