20090711 has 2 divisors, whose sum is σ = 20090712. Its totient is φ = 20090710.

The previous prime is 20090689. The next prime is 20090723. The reversal of 20090711 is 11709002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20090711 - 2⁶ = 20090647 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 (20090611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045355 + 10045356.

It is an arithmetic number, because the mean of its divisors is an integer number (10045356).

Almost surely, 2^20090711 is an apocalyptic number.

20090711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20090711 is an equidigital number, since it uses as much as digits as its factorization.

20090711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20090711 is about 4482.2662794618. The cubic root of 20090711 is about 271.8515220136.

Adding to 20090711 its reverse (11709002), we get a palindrome (31799713).

The spelling of 20090711 in words is "twenty million, ninety thousand, seven hundred eleven".