21821482972776 has 32 divisors (see below), whose sum is σ = 54553838018400. Its totient is φ = 7273810246080.

The previous prime is 21821482972753. The next prime is 21821482972811. The reversal of 21821482972776 is 67727928412812.

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, 12725395 + ... + 14338013.

It is an arithmetic number, because the mean of its divisors is an integer number (1704807438075).

Almost surely, 2^{21821482972776} is an apocalyptic number.

It is an amenable number.

21821482972776 is an abundant number, since it is smaller than the sum of its proper divisors (32732355045624).

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

21821482972776 is a wasteful number, since it uses less digits than its factorization.

21821482972776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176449 (or 2176445 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 66.

The spelling of 21821482972776 in words is "twenty-one trillion, eight hundred twenty-one billion, four hundred eighty-two million, nine hundred seventy-two thousand, seven hundred seventy-six".