21330513323 has 16 divisors (see below), whose sum is σ = 24931307520. Its totient is φ = 17869204896.

The previous prime is 21330513319. The next prime is 21330513359. The reversal of 21330513323 is 32331503312.

It is a cyclic number.

It is not a de Polignac number, because 21330513323 - 2² = 21330513319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21330513292 and 21330513301.

It is not an unprimeable number, because it can be changed into a prime (21330518323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191465 + ... + 281637.

It is an arithmetic number, because the mean of its divisors is an integer number (1558206720).

Almost surely, 2^21330513323 is an apocalyptic number.

21330513323 is a deficient number, since it is larger than the sum of its proper divisors (3600794197).

21330513323 is an equidigital number, since it uses as much as digits as its factorization.

21330513323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90946.

The product of its (nonzero) digits is 4860, while the sum is 26.

The spelling of 21330513323 in words is "twenty-one billion, three hundred thirty million, five hundred thirteen thousand, three hundred twenty-three".