20413291 has 2 divisors, whose sum is σ = 20413292. Its totient is φ = 20413290.

The previous prime is 20413279. The next prime is 20413331. The reversal of 20413291 is 19231402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20413291 - 2¹¹ = 20411243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20413231) 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, 10206645 + 10206646.

It is an arithmetic number, because the mean of its divisors is an integer number (10206646).

Almost surely, 2^20413291 is an apocalyptic number.

20413291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413291 is an equidigital number, since it uses as much as digits as its factorization.

20413291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20413291 is about 4518.1070151115. The cubic root of 20413291 is about 273.2987690116.

Adding to 20413291 its reverse (19231402), we get a palindrome (39644693).

The spelling of 20413291 in words is "twenty million, four hundred thirteen thousand, two hundred ninety-one".