20023147 has 2 divisors, whose sum is σ = 20023148. Its totient is φ = 20023146.

The previous prime is 20023141. The next prime is 20023163. The reversal of 20023147 is 74132002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20023147 - 2³ = 20023139 is a prime.

It is not a weakly prime, because it can be changed into another prime (20023141) 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, 10011573 + 10011574.

It is an arithmetic number, because the mean of its divisors is an integer number (10011574).

Almost surely, 2^20023147 is an apocalyptic number.

20023147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023147 is an equidigital number, since it uses as much as digits as its factorization.

20023147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20023147 is about 4474.7231199260. The cubic root of 20023147 is about 271.5464389947.

Adding to 20023147 its reverse (74132002), we get a palindrome (94155149).

The spelling of 20023147 in words is "twenty million, twenty-three thousand, one hundred forty-seven".