20541307 has 2 divisors, whose sum is σ = 20541308. Its totient is φ = 20541306.

The previous prime is 20541293. The next prime is 20541317. The reversal of 20541307 is 70314502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20541307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20541317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270653 + 10270654.

It is an arithmetic number, because the mean of its divisors is an integer number (10270654).

Almost surely, 2^20541307 is an apocalyptic number.

20541307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541307 is an equidigital number, since it uses as much as digits as its factorization.

20541307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20541307 is about 4532.2518685528. The cubic root of 20541307 is about 273.8688834017.

Adding to 20541307 its reverse (70314502), we get a palindrome (90855809).

The spelling of 20541307 in words is "twenty million, five hundred forty-one thousand, three hundred seven".