20133323021 has 4 divisors (see below), whose sum is σ = 23009512032. Its totient is φ = 17257134012.

The previous prime is 20133323011. The next prime is 20133323027. The reversal of 20133323021 is 12032333102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20133323021 - 2¹⁰ = 20133321997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20133322984 and 20133323002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133323027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438094495 + ... + 1438094508.

It is an arithmetic number, because the mean of its divisors is an integer number (5752378008).

Almost surely, 2^20133323021 is an apocalyptic number.

It is an amenable number.

20133323021 is a deficient number, since it is larger than the sum of its proper divisors (2876189011).

20133323021 is an equidigital number, since it uses as much as digits as its factorization.

20133323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876189010.

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

Adding to 20133323021 its reverse (12032333102), we get a palindrome (32165656123).

The spelling of 20133323021 in words is "twenty billion, one hundred thirty-three million, three hundred twenty-three thousand, twenty-one".