21023330233 has 4 divisors (see below), whose sum is σ = 21701502208. Its totient is φ = 20345158260.

The previous prime is 21023330227. The next prime is 21023330239. The reversal of 21023330233 is 33203332012.

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 an interprime number because it is at equal distance from previous prime (21023330227) and next prime (21023330239).

It is a cyclic number.

It is not a de Polignac number, because 21023330233 - 2³³ = 12433395641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023330239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339085941 + ... + 339086002.

It is an arithmetic number, because the mean of its divisors is an integer number (5425375552).

Almost surely, 2^21023330233 is an apocalyptic number.

It is an amenable number.

21023330233 is a deficient number, since it is larger than the sum of its proper divisors (678171975).

21023330233 is an equidigital number, since it uses as much as digits as its factorization.

21023330233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678171974.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21023330233 its reverse (33203332012), we get a palindrome (54226662245).

The spelling of 21023330233 in words is "twenty-one billion, twenty-three million, three hundred thirty thousand, two hundred thirty-three".