21704115195 has 192 divisors, whose sum is σ = 45504036864. Its totient is φ = 9364481280.

The previous prime is 21704115193. The next prime is 21704115211. The reversal of 21704115195 is 59151140712.

It is not a de Polignac number, because 21704115195 - 2¹ = 21704115193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21704115193) 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 191 ways as a sum of consecutive naturals, for example, 65571180 + ... + 65571510.

It is an arithmetic number, because the mean of its divisors is an integer number (237000192).

Almost surely, 2^21704115195 is an apocalyptic number.

21704115195 is an abundant number, since it is smaller than the sum of its proper divisors (23799921669).

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

21704115195 is a wasteful number, since it uses less digits than its factorization.

21704115195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The spelling of 21704115195 in words is "twenty-one billion, seven hundred four million, one hundred fifteen thousand, one hundred ninety-five".