21003206327233 has 8 divisors (see below), whose sum is σ = 22660646902376. Its totient is φ = 19351738512000.

The previous prime is 21003206327209. The next prime is 21003206327269. The reversal of 21003206327233 is 33272360230012.

It can be written as a sum of positive squares in 4 ways, for example, as 74301491889 + 20928904835344 = 272583^2 + 4574812^2 .

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 21003206327233 - 2²⁵ = 21003172772801 is a prime.

It is a super-2 number, since 2×21003206327233² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003206327293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493182668 + ... + 1493196733.

It is an arithmetic number, because the mean of its divisors is an integer number (2832580862797).

Almost surely, 2^{21003206327233} is an apocalyptic number.

It is an amenable number.

21003206327233 is a deficient number, since it is larger than the sum of its proper divisors (1657440575143).

21003206327233 is a wasteful number, since it uses less digits than its factorization.

21003206327233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986379955.

The product of its (nonzero) digits is 54432, while the sum is 34.

Adding to 21003206327233 its reverse (33272360230012), we get a palindrome (54275566557245).

The spelling of 21003206327233 in words is "twenty-one trillion, three billion, two hundred six million, three hundred twenty-seven thousand, two hundred thirty-three".