20123707 has 2 divisors, whose sum is σ = 20123708. Its totient is φ = 20123706.

The previous prime is 20123687. The next prime is 20123713. The reversal of 20123707 is 70732102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123707 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123737) 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, 10061853 + 10061854.

It is an arithmetic number, because the mean of its divisors is an integer number (10061854).

Almost surely, 2^20123707 is an apocalyptic number.

20123707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123707 is an equidigital number, since it uses as much as digits as its factorization.

20123707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20123707 is about 4485.9454967710. The cubic root of 20123707 is about 272.0002658230. Note that the first 3 decimals are identical.

Adding to 20123707 its reverse (70732102), we get a palindrome (90855809).

The spelling of 20123707 in words is "twenty million, one hundred twenty-three thousand, seven hundred seven".