20668252711 has 4 divisors (see below), whose sum is σ = 20694186072. Its totient is φ = 20642319352.

The previous prime is 20668252667. The next prime is 20668252727. The reversal of 20668252711 is 11725286602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20668252711 - 2¹¹ = 20668250663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20668252211) 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, 12965485 + ... + 12967078.

It is an arithmetic number, because the mean of its divisors is an integer number (5173546518).

Almost surely, 2^20668252711 is an apocalyptic number.

20668252711 is a deficient number, since it is larger than the sum of its proper divisors (25933361).

20668252711 is an equidigital number, since it uses as much as digits as its factorization.

20668252711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25933360.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 20668252711 in words is "twenty billion, six hundred sixty-eight million, two hundred fifty-two thousand, seven hundred eleven".