20000023 has 2 divisors, whose sum is σ = 20000024. Its totient is φ = 20000022.

The previous prime is 20000003. The next prime is 20000033. The reversal of 20000023 is 32000002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19999970 and 20000015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000011 + 10000012.

It is an arithmetic number, because the mean of its divisors is an integer number (10000012).

Almost surely, 2^20000023 is an apocalyptic number.

20000023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000023 is an equidigital number, since it uses as much as digits as its factorization.

20000023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 20000023 is about 4472.1385264770. The cubic root of 20000023 is about 271.4418657121.

Adding to 20000023 its reverse (32000002), we get a palindrome (52000025).

It can be divided in two parts, 2000002 and 3, that multiplied together give a palindrome (6000006).

The spelling of 20000023 in words is "twenty million, twenty-three", and thus it is an aban number and an uban number.