20606565607 has 2 divisors, whose sum is σ = 20606565608. Its totient is φ = 20606565606.

The previous prime is 20606565593. The next prime is 20606565631. The reversal of 20606565607 is 70656560602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20606565607 is a prime.

It is a super-3 number, since 3×20606565607³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20606560607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303282803 + 10303282804.

It is an arithmetic number, because the mean of its divisors is an integer number (10303282804).

Almost surely, 2^20606565607 is an apocalyptic number.

20606565607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20606565607 is an equidigital number, since it uses as much as digits as its factorization.

20606565607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 20606565607 in words is "twenty billion, six hundred six million, five hundred sixty-five thousand, six hundred seven".