21086680034 has 16 divisors (see below), whose sum is σ = 36155325888. Its totient is φ = 9035465712.

The previous prime is 21086679983. The next prime is 21086680051. The reversal of 21086680034 is 43008668012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21086680034.

It is an unprimeable number.

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, 60824 + ... + 214179.

It is an arithmetic number, because the mean of its divisors is an integer number (2259707868).

Almost surely, 2^21086680034 is an apocalyptic number.

21086680034 is a deficient number, since it is larger than the sum of its proper divisors (15068645854).

21086680034 is a wasteful number, since it uses less digits than its factorization.

21086680034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280489.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 21086680034 in words is "twenty-one billion, eighty-six million, six hundred eighty thousand, thirty-four".