21242422194 has 16 divisors (see below), whose sum is σ = 48554107968. Its totient is φ = 6069263472.

The previous prime is 21242422177. The next prime is 21242422247. The reversal of 21242422194 is 49122424212.

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, 252885937 + ... + 252886020.

It is an arithmetic number, because the mean of its divisors is an integer number (3034631748).

Almost surely, 2^21242422194 is an apocalyptic number.

21242422194 is an abundant number, since it is smaller than the sum of its proper divisors (27311685774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21242422194 is a wasteful number, since it uses less digits than its factorization.

21242422194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505771969.

The product of its digits is 18432, while the sum is 33.

The spelling of 21242422194 in words is "twenty-one billion, two hundred forty-two million, four hundred twenty-two thousand, one hundred ninety-four".