20123347 has 2 divisors, whose sum is σ = 20123348. Its totient is φ = 20123346.

The previous prime is 20123339. The next prime is 20123377. The reversal of 20123347 is 74332102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20123347 - 2³ = 20123339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20123377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061673 + 10061674.

It is an arithmetic number, because the mean of its divisors is an integer number (10061674).

Almost surely, 2^20123347 is an apocalyptic number.

20123347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123347 is an equidigital number, since it uses as much as digits as its factorization.

20123347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20123347 is about 4485.9053712712. The cubic root of 20123347 is about 271.9986438442.

Adding to 20123347 its reverse (74332102), we get a palindrome (94455449).

The spelling of 20123347 in words is "twenty million, one hundred twenty-three thousand, three hundred forty-seven".