21323302328 has 8 divisors (see below), whose sum is σ = 39981191880. Its totient is φ = 10661651160.

The previous prime is 21323302321. The next prime is 21323302339. The reversal of 21323302328 is 82320332312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21323302328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323302321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332706388 + ... + 1332706403.

It is an arithmetic number, because the mean of its divisors is an integer number (4997648985).

Almost surely, 2^21323302328 is an apocalyptic number.

It is an amenable number.

21323302328 is a deficient number, since it is larger than the sum of its proper divisors (18657889552).

21323302328 is a wasteful number, since it uses less digits than its factorization.

21323302328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665412797 (or 2665412793 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 21323302328 in words is "twenty-one billion, three hundred twenty-three million, three hundred two thousand, three hundred twenty-eight".