21002322033 has 48 divisors (see below), whose sum is σ = 39484912320. Its totient is φ = 10910289600.

The previous prime is 21002321941. The next prime is 21002322043. The reversal of 21002322033 is 33022320012.

It is a happy number.

It is not a de Polignac number, because 21002322033 - 2⁹ = 21002321521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002321997 and 21002322015.

It is not an unprimeable number, because it can be changed into a prime (21002322043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 707028 + ... + 736133.

It is an arithmetic number, because the mean of its divisors is an integer number (822602340).

Almost surely, 2^21002322033 is an apocalyptic number.

It is an amenable number.

21002322033 is a deficient number, since it is larger than the sum of its proper divisors (18482590287).

21002322033 is a wasteful number, since it uses less digits than its factorization.

21002322033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443195 (or 1443182 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21002322033 its reverse (33022320012), we get a palindrome (54024642045).

The spelling of 21002322033 in words is "twenty-one billion, two million, three hundred twenty-two thousand, thirty-three".