23320330021 has 4 divisors (see below), whose sum is σ = 23320663200. Its totient is φ = 23319996844.

The previous prime is 23320329983. The next prime is 23320330043. The reversal of 23320330021 is 12003302332.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23320330021 - 2¹⁷ = 23320198949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23320330081) 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, 16561 + ... + 216598.

It is an arithmetic number, because the mean of its divisors is an integer number (5830165800).

Almost surely, 2^23320330021 is an apocalyptic number.

It is an amenable number.

23320330021 is a deficient number, since it is larger than the sum of its proper divisors (333179).

23320330021 is a wasteful number, since it uses less digits than its factorization.

23320330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333178.

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

Adding to 23320330021 its reverse (12003302332), we get a palindrome (35323632353).

The spelling of 23320330021 in words is "twenty-three billion, three hundred twenty million, three hundred thirty thousand, twenty-one".