20204711 has 4 divisors (see below), whose sum is σ = 20674632. Its totient is φ = 19734792.

The previous prime is 20204707. The next prime is 20204719. The reversal of 20204711 is 11740202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11740202 = 2 ⋅5870101.

It is a cyclic number.

It is not a de Polignac number, because 20204711 - 2² = 20204707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20204711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234896 + ... + 234981.

It is an arithmetic number, because the mean of its divisors is an integer number (5168658).

Almost surely, 2^20204711 is an apocalyptic number.

20204711 is a deficient number, since it is larger than the sum of its proper divisors (469921).

20204711 is an equidigital number, since it uses as much as digits as its factorization.

20204711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469920.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20204711 is about 4494.9650721669. The cubic root of 20204711 is about 272.3647383025.

Adding to 20204711 its reverse (11740202), we get a palindrome (31944913).

The spelling of 20204711 in words is "twenty million, two hundred four thousand, seven hundred eleven".