21032023 has 2 divisors, whose sum is σ = 21032024. Its totient is φ = 21032022.

The previous prime is 21032003. The next prime is 21032059. The reversal of 21032023 is 32023012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21032023 - 2¹³ = 21023831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21031994 and 21032012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516011 + 10516012.

It is an arithmetic number, because the mean of its divisors is an integer number (10516012).

Almost surely, 2^21032023 is an apocalyptic number.

21032023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032023 is an equidigital number, since it uses as much as digits as its factorization.

21032023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21032023 is about 4586.0683597173. The cubic root of 21032023 is about 276.0325829698.

Adding to 21032023 its reverse (32023012), we get a palindrome (53055035).

The spelling of 21032023 in words is "twenty-one million, thirty-two thousand, twenty-three".