21330502363 has 4 divisors (see below), whose sum is σ = 21337914240. Its totient is φ = 21323090488.

The previous prime is 21330502357. The next prime is 21330502421. The reversal of 21330502363 is 36320503312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330502363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330502313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3701620 + ... + 3707377.

It is an arithmetic number, because the mean of its divisors is an integer number (5334478560).

Almost surely, 2^21330502363 is an apocalyptic number.

21330502363 is a deficient number, since it is larger than the sum of its proper divisors (7411877).

21330502363 is an equidigital number, since it uses as much as digits as its factorization.

21330502363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411876.

The product of its (nonzero) digits is 9720, while the sum is 28.

The spelling of 21330502363 in words is "twenty-one billion, three hundred thirty million, five hundred two thousand, three hundred sixty-three".