21847590163 has 48 divisors (see below), whose sum is σ = 26709196800. Its totient is φ = 17797631040.

The previous prime is 21847590143. The next prime is 21847590179. The reversal of 21847590163 is 36109574812.

It is not a de Polignac number, because 21847590163 - 2¹⁷ = 21847459091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21847590143) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 21026998 + ... + 21028036.

It is an arithmetic number, because the mean of its divisors is an integer number (556441600).

It is a 1-persistent number, because it is pandigital, but 2⋅21847590163 = 43695180326 is not.

Almost surely, 2^21847590163 is an apocalyptic number.

21847590163 is a deficient number, since it is larger than the sum of its proper divisors (4861606637).

21847590163 is a wasteful number, since it uses less digits than its factorization.

21847590163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 21847590163 in words is "twenty-one billion, eight hundred forty-seven million, five hundred ninety thousand, one hundred sixty-three".