21050829115 has 16 divisors (see below), whose sum is σ = 25872431616. Its totient is φ = 16436368000.

The previous prime is 21050829109. The next prime is 21050829127. The reversal of 21050829115 is 51192805012.

It is not a de Polignac number, because 21050829115 - 2⁵ = 21050829083 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 157336 + ... + 258565.

It is an arithmetic number, because the mean of its divisors is an integer number (1617026976).

Almost surely, 2^21050829115 is an apocalyptic number.

21050829115 is a deficient number, since it is larger than the sum of its proper divisors (4821602501).

21050829115 is a wasteful number, since it uses less digits than its factorization.

21050829115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416150.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 21050829115 in words is "twenty-one billion, fifty million, eight hundred twenty-nine thousand, one hundred fifteen".