20606605263 has 12 divisors (see below), whose sum is σ = 29793924160. Its totient is φ = 13724431776.

The previous prime is 20606605189. The next prime is 20606605273. The reversal of 20606605263 is 36250660602.

20606605263 is a `hidden beast` number, since 20 + 6 + 0 + 6 + 605 + 26 + 3 = 666.

It is not a de Polignac number, because 20606605263 - 2¹³ = 20606597071 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 (20606605273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1098943 + ... + 1117536.

Almost surely, 2^20606605263 is an apocalyptic number.

20606605263 is a deficient number, since it is larger than the sum of its proper divisors (9187318897).

20606605263 is a wasteful number, since it uses less digits than its factorization.

20606605263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217518 (or 2217515 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20606605263 in words is "twenty billion, six hundred six million, six hundred five thousand, two hundred sixty-three".