20233303021 has 4 divisors (see below), whose sum is σ = 21113011872. Its totient is φ = 19353594172.

The previous prime is 20233302989. The next prime is 20233303037. The reversal of 20233303021 is 12030333202.

It is a happy number.

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 20233303021 - 2⁵ = 20233302989 is a prime.

It is a super-2 number, since 2×20233303021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20233303021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233303061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439854391 + ... + 439854436.

It is an arithmetic number, because the mean of its divisors is an integer number (5278252968).

Almost surely, 2^20233303021 is an apocalyptic number.

It is an amenable number.

20233303021 is a deficient number, since it is larger than the sum of its proper divisors (879708851).

20233303021 is an equidigital number, since it uses as much as digits as its factorization.

20233303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879708850.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20233303021 its reverse (12030333202), we get a palindrome (32263636223).

The spelling of 20233303021 in words is "twenty billion, two hundred thirty-three million, three hundred three thousand, twenty-one".