20321019933 has 4 divisors (see below), whose sum is σ = 27094693248. Its totient is φ = 13547346620.

The previous prime is 20321019923. The next prime is 20321019949. The reversal of 20321019933 is 33991012302.

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 20321019933 - 2¹² = 20321015837 is a prime.

It is a super-4 number, since 4×20321019933⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20321019894 and 20321019903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321019923) 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 3 ways as a sum of consecutive naturals, for example, 3386836653 + ... + 3386836658.

It is an arithmetic number, because the mean of its divisors is an integer number (6773673312).

Almost surely, 2^20321019933 is an apocalyptic number.

It is an amenable number.

20321019933 is a deficient number, since it is larger than the sum of its proper divisors (6773673315).

20321019933 is an equidigital number, since it uses as much as digits as its factorization.

20321019933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773673314.

The product of its (nonzero) digits is 8748, while the sum is 33.

The spelling of 20321019933 in words is "twenty billion, three hundred twenty-one million, nineteen thousand, nine hundred thirty-three".