20233133021 has 16 divisors (see below), whose sum is σ = 21069115200. Its totient is φ = 19413249408.

The previous prime is 20233132999. The next prime is 20233133027. The reversal of 20233133021 is 12033133202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20233133021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20233132984 and 20233133002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233133027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1741610 + ... + 1753188.

It is an arithmetic number, because the mean of its divisors is an integer number (1316819700).

Almost surely, 2^20233133021 is an apocalyptic number.

It is an amenable number.

20233133021 is a deficient number, since it is larger than the sum of its proper divisors (835982179).

20233133021 is a wasteful number, since it uses less digits than its factorization.

20233133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12268.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20233133021 its reverse (12033133202), we get a palindrome (32266266223).

The spelling of 20233133021 in words is "twenty billion, two hundred thirty-three million, one hundred thirty-three thousand, twenty-one".