21072326799 has 8 divisors (see below), whose sum is σ = 28374618672. Its totient is φ = 13909126400.

The previous prime is 21072326741. The next prime is 21072326819. The reversal of 21072326799 is 99762327012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21072326799 - 2¹³ = 21072318607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072326729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34772514 + ... + 34773119.

It is an arithmetic number, because the mean of its divisors is an integer number (3546827334).

Almost surely, 2^21072326799 is an apocalyptic number.

21072326799 is a deficient number, since it is larger than the sum of its proper divisors (7302291873).

21072326799 is a wasteful number, since it uses less digits than its factorization.

21072326799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69545737.

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 21072326799 in words is "twenty-one billion, seventy-two million, three hundred twenty-six thousand, seven hundred ninety-nine".