20668255211 has 2 divisors, whose sum is σ = 20668255212. Its totient is φ = 20668255210.

The previous prime is 20668255183. The next prime is 20668255219. The reversal of 20668255211 is 11255286602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20668255211 - 2¹⁴ = 20668238827 is a prime.

It is not a weakly prime, because it can be changed into another prime (20668255219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10334127605 + 10334127606.

It is an arithmetic number, because the mean of its divisors is an integer number (10334127606).

Almost surely, 2^20668255211 is an apocalyptic number.

20668255211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20668255211 is an equidigital number, since it uses as much as digits as its factorization.

20668255211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 20668255211 in words is "twenty billion, six hundred sixty-eight million, two hundred fifty-five thousand, two hundred eleven".