20708011 has 2 divisors, whose sum is σ = 20708012. Its totient is φ = 20708010.

The previous prime is 20707991. The next prime is 20708021. The reversal of 20708011 is 11080702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20708011 - 2⁵ = 20707979 is a prime.

It is a super-2 number, since 2×20708011² = 857643439152242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20708011.

It is not a weakly prime, because it can be changed into another prime (20708021) 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, 10354005 + 10354006.

It is an arithmetic number, because the mean of its divisors is an integer number (10354006).

Almost surely, 2^20708011 is an apocalyptic number.

20708011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20708011 is an equidigital number, since it uses as much as digits as its factorization.

20708011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 20708011 is about 4550.6055640980. The cubic root of 20708011 is about 274.6077537332.

Adding to 20708011 its reverse (11080702), we get a palindrome (31788713).

The spelling of 20708011 in words is "twenty million, seven hundred eight thousand, eleven".