20600291 has 2 divisors, whose sum is σ = 20600292. Its totient is φ = 20600290.

The previous prime is 20600269. The next prime is 20600297. The reversal of 20600291 is 19200602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20600291 is a prime.

It is not a weakly prime, because it can be changed into another prime (20600297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300145 + 10300146.

It is an arithmetic number, because the mean of its divisors is an integer number (10300146).

Almost surely, 2^20600291 is an apocalyptic number.

20600291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20600291 is an equidigital number, since it uses as much as digits as its factorization.

20600291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20600291 is about 4538.7543445311. The cubic root of 20600291 is about 274.1307694471.

Adding to 20600291 its reverse (19200602), we get a palindrome (39800893).

The spelling of 20600291 in words is "twenty million, six hundred thousand, two hundred ninety-one".