21020202033 has 16 divisors (see below), whose sum is σ = 28113509760. Its totient is φ = 13970226816.

The previous prime is 21020201977. The next prime is 21020202059. The reversal of 21020202033 is 33020202012.

It is not a de Polignac number, because 21020202033 - 2⁸ = 21020201777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21020202233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2298516 + ... + 2307642.

It is an arithmetic number, because the mean of its divisors is an integer number (1757094360).

Almost surely, 2^21020202033 is an apocalyptic number.

It is an amenable number.

21020202033 is a deficient number, since it is larger than the sum of its proper divisors (7093307727).

21020202033 is a wasteful number, since it uses less digits than its factorization.

21020202033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21020202033 its reverse (33020202012), we get a palindrome (54040404045).

The spelling of 21020202033 in words is "twenty-one billion, twenty million, two hundred two thousand, thirty-three".