20020723 has 2 divisors, whose sum is σ = 20020724. Its totient is φ = 20020722.

The previous prime is 20020711. The next prime is 20020753. The reversal of 20020723 is 32702002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20020723 - 2⁵ = 20020691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020697 and 20020706.

It is not a weakly prime, because it can be changed into another prime (20020753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010361 + 10010362.

It is an arithmetic number, because the mean of its divisors is an integer number (10010362).

Almost surely, 2^20020723 is an apocalyptic number.

20020723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020723 is an equidigital number, since it uses as much as digits as its factorization.

20020723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20020723 is about 4474.4522569807. The cubic root of 20020723 is about 271.5354807584.

Adding to 20020723 its reverse (32702002), we get a palindrome (52722725).

The spelling of 20020723 in words is "twenty million, twenty thousand, seven hundred twenty-three".