20125723 has 2 divisors, whose sum is σ = 20125724. Its totient is φ = 20125722.

The previous prime is 20125697. The next prime is 20125747. The reversal of 20125723 is 32752102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20125723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20125694 and 20125703.

It is not a weakly prime, because it can be changed into another prime (20185723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062861 + 10062862.

It is an arithmetic number, because the mean of its divisors is an integer number (10062862).

Almost surely, 2^20125723 is an apocalyptic number.

20125723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125723 is an equidigital number, since it uses as much as digits as its factorization.

20125723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20125723 is about 4486.1701929374. The cubic root of 20125723 is about 272.0093485469.

Adding to 20125723 its reverse (32752102), we get a palindrome (52877825).

The spelling of 20125723 in words is "twenty million, one hundred twenty-five thousand, seven hundred twenty-three".