21322727312 has 20 divisors (see below), whose sum is σ = 41721824796. Its totient is φ = 10555804800.

The previous prime is 21322727291. The next prime is 21322727317. The reversal of 21322727312 is 21372722312.

It can be written as a sum of positive squares in 2 ways, for example, as 15993143296 + 5329584016 = 126464^2 + 73004^2 .

It is not an unprimeable number, because it can be changed into a prime (21322727317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6595763 + ... + 6598994.

Almost surely, 2^21322727312 is an apocalyptic number.

It is an amenable number.

21322727312 is a deficient number, since it is larger than the sum of its proper divisors (20399097484).

21322727312 is a wasteful number, since it uses less digits than its factorization.

21322727312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13194866 (or 13194860 counting only the distinct ones).

The product of its digits is 14112, while the sum is 32.

Subtracting 21322727312 from its reverse (21372722312), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 21322727312 in words is "twenty-one billion, three hundred twenty-two million, seven hundred twenty-seven thousand, three hundred twelve".