21323204432 has 10 divisors (see below), whose sum is σ = 41313708618. Its totient is φ = 10661602208.

The previous prime is 21323204407. The next prime is 21323204459. The reversal of 21323204432 is 23440232312.

It can be written as a sum of positive squares in only one way, i.e., 13233281296 + 8089923136 = 115036^2 + 89944^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666350123 + ... + 666350154.

Almost surely, 2^21323204432 is an apocalyptic number.

It is an amenable number.

21323204432 is a deficient number, since it is larger than the sum of its proper divisors (19990504186).

21323204432 is a wasteful number, since it uses less digits than its factorization.

21323204432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332700285 (or 1332700279 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21323204432 its reverse (23440232312), we get a palindrome (44763436744).

The spelling of 21323204432 in words is "twenty-one billion, three hundred twenty-three million, two hundred four thousand, four hundred thirty-two".