20341247 has 2 divisors, whose sum is σ = 20341248. Its totient is φ = 20341246.

The previous prime is 20341213. The next prime is 20341261. The reversal of 20341247 is 74214302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20341247 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 (20341297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170623 + 10170624.

It is an arithmetic number, because the mean of its divisors is an integer number (10170624).

Almost surely, 2^20341247 is an apocalyptic number.

20341247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20341247 is an equidigital number, since it uses as much as digits as its factorization.

20341247 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 20341247 is about 4510.1271600699. The cubic root of 20341247 is about 272.9768750511.

Adding to 20341247 its reverse (74214302), we get a palindrome (94555549).

The spelling of 20341247 in words is "twenty million, three hundred forty-one thousand, two hundred forty-seven".