21004330233 has 16 divisors (see below), whose sum is σ = 28171238400. Its totient is φ = 13920205200.

The previous prime is 21004330231. The next prime is 21004330241. The reversal of 21004330233 is 33203340012.

It is not a de Polignac number, because 21004330233 - 2¹ = 21004330231 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21004330231) 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, 3299908 + ... + 3306266.

It is an arithmetic number, because the mean of its divisors is an integer number (1760702400).

Almost surely, 2^21004330233 is an apocalyptic number.

It is an amenable number.

21004330233 is a deficient number, since it is larger than the sum of its proper divisors (7166908167).

21004330233 is a wasteful number, since it uses less digits than its factorization.

21004330233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21004330233 its reverse (33203340012), we get a palindrome (54207670245).

The spelling of 21004330233 in words is "twenty-one billion, four million, three hundred thirty thousand, two hundred thirty-three".