20611500206 has 32 divisors (see below), whose sum is σ = 34310411136. Its totient is φ = 9207324000.

The previous prime is 20611500187. The next prime is 20611500211. The reversal of 20611500206 is 60200511602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715801 + ... + 1727771.

It is an arithmetic number, because the mean of its divisors is an integer number (1072200348).

Almost surely, 2^20611500206 is an apocalyptic number.

20611500206 is a deficient number, since it is larger than the sum of its proper divisors (13698910930).

20611500206 is a wasteful number, since it uses less digits than its factorization.

20611500206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13328.

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 20611500206 in words is "twenty billion, six hundred eleven million, five hundred thousand, two hundred six".