21100802834 has 16 divisors (see below), whose sum is σ = 32214996000. Its totient is φ = 10362774624.

The previous prime is 21100802791. The next prime is 21100802857. The reversal of 21100802834 is 43820800112.

It is a junction number, because it is equal to n+sod(n) for n = 21100802797 and 21100802806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64742 + ... + 215390.

It is an arithmetic number, because the mean of its divisors is an integer number (2013437250).

Almost surely, 2^21100802834 is an apocalyptic number.

21100802834 is a deficient number, since it is larger than the sum of its proper divisors (11114193166).

21100802834 is a wasteful number, since it uses less digits than its factorization.

21100802834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151897.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 21100802834 in words is "twenty-one billion, one hundred million, eight hundred two thousand, eight hundred thirty-four".