21941748576 has 72 divisors (see below), whose sum is σ = 68069298024. Its totient is φ = 6649013760.

The previous prime is 21941748553. The next prime is 21941748583. The reversal of 21941748576 is 67584714912.

21941748576 is a `hidden beast` number, since 2 + 1 + 94 + 1 + 7 + 485 + 76 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3459861 + ... + 3466196.

It is an arithmetic number, because the mean of its divisors is an integer number (945406917).

Almost surely, 2^21941748576 is an apocalyptic number.

It is an amenable number.

21941748576 is an abundant number, since it is smaller than the sum of its proper divisors (46127549448).

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

21941748576 is a wasteful number, since it uses less digits than its factorization.

21941748576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926084 (or 6926073 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 21941748576 in words is "twenty-one billion, nine hundred forty-one million, seven hundred forty-eight thousand, five hundred seventy-six".