20660245211 has 4 divisors (see below), whose sum is σ = 20909163912. Its totient is φ = 20411326512.

The previous prime is 20660245201. The next prime is 20660245219. The reversal of 20660245211 is 11254206602.

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 20660245211 - 2³⁴ = 3480376027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20660245219) 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, 124459226 + ... + 124459391.

It is an arithmetic number, because the mean of its divisors is an integer number (5227290978).

Almost surely, 2^20660245211 is an apocalyptic number.

20660245211 is a deficient number, since it is larger than the sum of its proper divisors (248918701).

20660245211 is an equidigital number, since it uses as much as digits as its factorization.

20660245211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248918700.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 20660245211 in words is "twenty billion, six hundred sixty million, two hundred forty-five thousand, two hundred eleven".