20806271674 has 16 divisors (see below), whose sum is σ = 32501272320. Its totient is φ = 9978454080.

The previous prime is 20806271663. The next prime is 20806271677. The reversal of 20806271674 is 47617260802.

It is a self number, because there is not a number n which added to its sum of digits gives 20806271674.

It is not an unprimeable number, because it can be changed into a prime (20806271677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477884 + ... + 1491895.

It is an arithmetic number, because the mean of its divisors is an integer number (2031329520).

Almost surely, 2^20806271674 is an apocalyptic number.

20806271674 is a deficient number, since it is larger than the sum of its proper divisors (11695000646).

20806271674 is a wasteful number, since it uses less digits than its factorization.

20806271674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969925.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 20806271674 in words is "twenty billion, eight hundred six million, two hundred seventy-one thousand, six hundred seventy-four".