21323404496 has 10 divisors (see below), whose sum is σ = 41314096242. Its totient is φ = 10661702240.

The previous prime is 21323404483. The next prime is 21323404507. The reversal of 21323404496 is 69440432312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11054419600 + 10268984896 = 105140^2 + 101336^2 .

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, 666356375 + ... + 666356406.

Almost surely, 2^21323404496 is an apocalyptic number.

It is an amenable number.

21323404496 is a deficient number, since it is larger than the sum of its proper divisors (19990691746).

21323404496 is a wasteful number, since it uses less digits than its factorization.

21323404496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332712789 (or 1332712783 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 21323404496 in words is "twenty-one billion, three hundred twenty-three million, four hundred four thousand, four hundred ninety-six".