20836205234 has 16 divisors (see below), whose sum is σ = 34568175768. Its totient is φ = 9356798592.

The previous prime is 20836205233. The next prime is 20836205293. The reversal of 20836205234 is 43250263802.

It can be written as a sum of positive squares in 4 ways, for example, as 17028945025 + 3807260209 = 130495^2 + 61703^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20836205194 and 20836205203.

It is not an unprimeable number, because it can be changed into a prime (20836205233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10828667 + ... + 10830590.

Almost surely, 2^20836205234 is an apocalyptic number.

20836205234 is a deficient number, since it is larger than the sum of its proper divisors (13731970534).

20836205234 is a wasteful number, since it uses less digits than its factorization.

20836205234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21659309.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20836205234 in words is "twenty billion, eight hundred thirty-six million, two hundred five thousand, two hundred thirty-four".