21050015242 has 16 divisors (see below), whose sum is σ = 32968544832. Its totient is φ = 10061075200.

The previous prime is 21050015227. The next prime is 21050015249. The reversal of 21050015242 is 24251005012.

21050015242 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21050015249) 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, 69268 + ... + 216559.

It is an arithmetic number, because the mean of its divisors is an integer number (2060534052).

Almost surely, 2^21050015242 is an apocalyptic number.

21050015242 is a deficient number, since it is larger than the sum of its proper divisors (11918529590).

21050015242 is a wasteful number, since it uses less digits than its factorization.

21050015242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287453.

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 21050015242 in words is "twenty-one billion, fifty million, fifteen thousand, two hundred forty-two".