21003302233 has 12 divisors (see below), whose sum is σ = 21318060540. Its totient is φ = 20690989056.

The previous prime is 21003302231. The next prime is 21003302261. The reversal of 21003302233 is 33220330012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5211107344 + 15792194889 = 72188^2 + 125667^2 .

It is not a de Polignac number, because 21003302233 - 2¹ = 21003302231 is a prime.

It is a super-2 number, since 2×21003302233² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003302233.

It is not an unprimeable number, because it can be changed into a prime (21003302231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5084713 + ... + 5088841.

It is an arithmetic number, because the mean of its divisors is an integer number (1776505045).

Almost surely, 2^21003302233 is an apocalyptic number.

It is an amenable number.

21003302233 is a deficient number, since it is larger than the sum of its proper divisors (314758307).

21003302233 is an frugal number, since it uses more digits than its factorization.

21003302233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684 (or 4455 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21003302233 its reverse (33220330012), we get a palindrome (54223632245).

The spelling of 21003302233 in words is "twenty-one billion, three million, three hundred two thousand, two hundred thirty-three".