21030323023 has 2 divisors, whose sum is σ = 21030323024. Its totient is φ = 21030323022.

The previous prime is 21030323009. The next prime is 21030323047. The reversal of 21030323023 is 32032303012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21030323023 - 2³³ = 12440388431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030323123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515161511 + 10515161512.

It is an arithmetic number, because the mean of its divisors is an integer number (10515161512).

Almost surely, 2^21030323023 is an apocalyptic number.

21030323023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030323023 is an equidigital number, since it uses as much as digits as its factorization.

21030323023 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 21030323023 its reverse (32032303012), we get a palindrome (53062626035).

The spelling of 21030323023 in words is "twenty-one billion, thirty million, three hundred twenty-three thousand, twenty-three".