21831722882 has 6 divisors (see below), whose sum is σ = 32747897763. Its totient is φ = 10915756962.

The previous prime is 21831722879. The next prime is 21831722911. The reversal of 21831722882 is 28822713812.

It can be written as a sum of positive squares in only one way, i.e., 10915861441 + 10915861441 = 104479^2 + 104479^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104479.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 156719 + ... + 261197.

Almost surely, 2^21831722882 is an apocalyptic number.

21831722882 is a deficient number, since it is larger than the sum of its proper divisors (10916174881).

21831722882 is an frugal number, since it uses more digits than its factorization.

21831722882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208960 (or 104481 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The spelling of 21831722882 in words is "twenty-one billion, eight hundred thirty-one million, seven hundred twenty-two thousand, eight hundred eighty-two".