20210023 has 2 divisors, whose sum is σ = 20210024. Its totient is φ = 20210022.

The previous prime is 20209993. The next prime is 20210027. The reversal of 20210023 is 32001202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20209991 and 20210009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105011 + 10105012.

It is an arithmetic number, because the mean of its divisors is an integer number (10105012).

Almost surely, 2^20210023 is an apocalyptic number.

20210023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210023 is an equidigital number, since it uses as much as digits as its factorization.

20210023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20210023 is about 4495.5559166804. Note that the first 3 decimals coincide. The cubic root of 20210023 is about 272.3886052563.

Adding to 20210023 its reverse (32001202), we get a palindrome (52211225).

The spelling of 20210023 in words is "twenty million, two hundred ten thousand, twenty-three".