23203303021 has 2 divisors, whose sum is σ = 23203303022. Its totient is φ = 23203303020.

The previous prime is 23203302923. The next prime is 23203303027. The reversal of 23203303021 is 12030330232.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15826898025 + 7376404996 = 125805^2 + 85886^2 .

It is a cyclic number.

It is not a de Polignac number, because 23203303021 - 2²¹ = 23201205869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23203303021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23203303027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11601651510 + 11601651511.

It is an arithmetic number, because the mean of its divisors is an integer number (11601651511).

Almost surely, 2^23203303021 is an apocalyptic number.

It is an amenable number.

23203303021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23203303021 is an equidigital number, since it uses as much as digits as its factorization.

23203303021 is an evil number, because the sum of its binary digits is even.

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

Adding to 23203303021 its reverse (12030330232), we get a palindrome (35233633253).

The spelling of 23203303021 in words is "twenty-three billion, two hundred three million, three hundred three thousand, twenty-one".