20320711 has 2 divisors, whose sum is σ = 20320712. Its totient is φ = 20320710.

The previous prime is 20320687. The next prime is 20320723. The reversal of 20320711 is 11702302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20320711 - 2⁷ = 20320583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160355 + 10160356.

It is an arithmetic number, because the mean of its divisors is an integer number (10160356).

Almost surely, 2^20320711 is an apocalyptic number.

20320711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320711 is an equidigital number, since it uses as much as digits as its factorization.

20320711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20320711 is about 4507.8499309538. The cubic root of 20320711 is about 272.8849806411.

The spelling of 20320711 in words is "twenty million, three hundred twenty thousand, seven hundred eleven".