21595350194 has 16 divisors (see below), whose sum is σ = 35400633120. Its totient is φ = 9798627360.

The previous prime is 21595350151. The next prime is 21595350229. The reversal of 21595350194 is 49105359512.

It is a Curzon number.

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, 859379 + ... + 884150.

It is an arithmetic number, because the mean of its divisors is an integer number (2212539570).

Almost surely, 2^21595350194 is an apocalyptic number.

21595350194 is a deficient number, since it is larger than the sum of its proper divisors (13805282926).

21595350194 is a wasteful number, since it uses less digits than its factorization.

21595350194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744105.

The product of its (nonzero) digits is 243000, while the sum is 44.

The spelling of 21595350194 in words is "twenty-one billion, five hundred ninety-five million, three hundred fifty thousand, one hundred ninety-four".