20000723 has 2 divisors, whose sum is σ = 20000724. Its totient is φ = 20000722.

The previous prime is 20000713. The next prime is 20000753. The reversal of 20000723 is 32700002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20000723 - 2⁴ = 20000707 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000698 and 20000707.

It is not a weakly prime, because it can be changed into another prime (20000713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000361 + 10000362.

It is an arithmetic number, because the mean of its divisors is an integer number (10000362).

Almost surely, 2^20000723 is an apocalyptic number.

20000723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000723 is an equidigital number, since it uses as much as digits as its factorization.

20000723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20000723 is about 4472.2167881264. The cubic root of 20000723 is about 271.4450324933.

Adding to 20000723 its reverse (32700002), we get a palindrome (52700725).

The spelling of 20000723 in words is "twenty million, seven hundred twenty-three", and thus it is an aban number.