21013033323 has 8 divisors (see below), whose sum is σ = 28279222848. Its totient is φ = 13877766344.

The previous prime is 21013033309. The next prime is 21013033361. The reversal of 21013033323 is 32333031012.

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 21013033323 - 2⁵ = 21013033291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21013033323.

It is not an unprimeable number, because it can be changed into a prime (21013033373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32730261 + ... + 32730902.

It is an arithmetic number, because the mean of its divisors is an integer number (3534902856).

Almost surely, 2^21013033323 is an apocalyptic number.

21013033323 is a deficient number, since it is larger than the sum of its proper divisors (7266189525).

21013033323 is a wasteful number, since it uses less digits than its factorization.

21013033323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65461273.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21013033323 its reverse (32333031012), we get a palindrome (53346064335).

The spelling of 21013033323 in words is "twenty-one billion, thirteen million, thirty-three thousand, three hundred twenty-three".