20206247 has 2 divisors, whose sum is σ = 20206248. Its totient is φ = 20206246.

The previous prime is 20206223. The next prime is 20206271. The reversal of 20206247 is 74260202.

It is a balanced prime because it is at equal distance from previous prime (20206223) and next prime (20206271).

It is a cyclic number.

It is not a de Polignac number, because 20206247 - 2¹⁰ = 20205223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20208247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103123 + 10103124.

It is an arithmetic number, because the mean of its divisors is an integer number (10103124).

Almost surely, 2^20206247 is an apocalyptic number.

20206247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206247 is an equidigital number, since it uses as much as digits as its factorization.

20206247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20206247 is about 4495.1359267546. The cubic root of 20206247 is about 272.3716400202.

Adding to 20206247 its reverse (74260202), we get a palindrome (94466449).

The spelling of 20206247 in words is "twenty million, two hundred six thousand, two hundred forty-seven".