20206664613 has 12 divisors (see below), whose sum is σ = 29325736128. Its totient is φ = 13407264360.

The previous prime is 20206664591. The next prime is 20206664623. The reversal of 20206664613 is 31646660202.

It is not a de Polignac number, because 20206664613 - 2⁵ = 20206664581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206664623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5318445 + ... + 5322242.

It is an arithmetic number, because the mean of its divisors is an integer number (2443811344).

Almost surely, 2^20206664613 is an apocalyptic number.

It is an amenable number.

20206664613 is a deficient number, since it is larger than the sum of its proper divisors (9119071515).

20206664613 is a wasteful number, since it uses less digits than its factorization.

20206664613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10640904 (or 10640901 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 20206664613 in words is "twenty billion, two hundred six million, six hundred sixty-four thousand, six hundred thirteen".