20662711 has 2 divisors, whose sum is σ = 20662712. Its totient is φ = 20662710.

The previous prime is 20662699. The next prime is 20662721. The reversal of 20662711 is 11726602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20662711 - 2¹⁵ = 20629943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20662721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10331355 + 10331356.

It is an arithmetic number, because the mean of its divisors is an integer number (10331356).

Almost surely, 2^20662711 is an apocalyptic number.

20662711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20662711 is an equidigital number, since it uses as much as digits as its factorization.

20662711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20662711 is about 4545.6254795132. The cubic root of 20662711 is about 274.4073673035.

The spelling of 20662711 in words is "twenty million, six hundred sixty-two thousand, seven hundred eleven".