21650540343034 has 16 divisors (see below), whose sum is σ = 32536487802600. Its totient is φ = 10805045207040.

The previous prime is 21650540343011. The next prime is 21650540343043. The reversal of 21650540343034 is 43034304505612.

It can be written as a sum of positive squares in 4 ways, for example, as 21614270283225 + 36270059809 = 4649115^2 + 190447^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63574042 + ... + 63913690.

Almost surely, 2^{21650540343034} is an apocalyptic number.

21650540343034 is a deficient number, since it is larger than the sum of its proper divisors (10885947459566).

21650540343034 is a wasteful number, since it uses less digits than its factorization.

21650540343034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399105.

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 21650540343034 its reverse (43034304505612), we get a palindrome (64684844848646).

The spelling of 21650540343034 in words is "twenty-one trillion, six hundred fifty billion, five hundred forty million, three hundred forty-three thousand, thirty-four".