21633245328 has 20 divisors (see below), whose sum is σ = 55885883888. Its totient is φ = 7211081760.

The previous prime is 21633245327. The next prime is 21633245383. The reversal of 21633245328 is 82354233612.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21633245327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225346258 + ... + 225346353.

Almost surely, 2^21633245328 is an apocalyptic number.

It is an amenable number.

21633245328 is an abundant number, since it is smaller than the sum of its proper divisors (34252638560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21633245328 is a wasteful number, since it uses less digits than its factorization.

21633245328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450692622 (or 450692616 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The spelling of 21633245328 in words is "twenty-one billion, six hundred thirty-three million, two hundred forty-five thousand, three hundred twenty-eight".