21326344232 has 8 divisors (see below), whose sum is σ = 39986895450. Its totient is φ = 10663172112.

The previous prime is 21326344213. The next prime is 21326344253. The reversal of 21326344232 is 23244362312.

It can be written as a sum of positive squares in only one way, i.e., 11199142276 + 10127201956 = 105826^2 + 100634^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332896507 + ... + 1332896522.

Almost surely, 2^21326344232 is an apocalyptic number.

It is an amenable number.

21326344232 is a deficient number, since it is larger than the sum of its proper divisors (18660551218).

21326344232 is a wasteful number, since it uses less digits than its factorization.

21326344232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665793035 (or 2665793031 counting only the distinct ones).

The product of its digits is 41472, while the sum is 32.

The spelling of 21326344232 in words is "twenty-one billion, three hundred twenty-six million, three hundred forty-four thousand, two hundred thirty-two".