21033033033 has 8 divisors (see below), whose sum is σ = 28048576896. Its totient is φ = 14019755600.

The previous prime is 21033033017. The next prime is 21033033083. The reversal of 21033033033 is 33033033012.

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 21033033033 - 2⁴ = 21033033017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21033033013) 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, 544833 + ... + 582158.

It is an arithmetic number, because the mean of its divisors is an integer number (3506072112).

Almost surely, 2^21033033033 is an apocalyptic number.

It is an amenable number.

21033033033 is a deficient number, since it is larger than the sum of its proper divisors (7015543863).

21033033033 is a wasteful number, since it uses less digits than its factorization.

21033033033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133215.

The product of its (nonzero) digits is 1458, while the sum is 21.

Subtracting from 21033033033 its sum of digits (21), we obtain a palindrome (21033033012).

Adding to 21033033033 its reverse (33033033012), we get a palindrome (54066066045).

The spelling of 21033033033 in words is "twenty-one billion, thirty-three million, thirty-three thousand, thirty-three".