21753871098 has 16 divisors (see below), whose sum is σ = 43517108736. Its totient is φ = 7249729280.

The previous prime is 21753871049. The next prime is 21753871127. The reversal of 21753871098 is 89017835712.

It is a self number, because there is not a number n which added to its sum of digits gives 21753871098.

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, 359898 + ... + 415973.

It is an arithmetic number, because the mean of its divisors is an integer number (2719819296).

Almost surely, 2^21753871098 is an apocalyptic number.

21753871098 is an abundant number, since it is smaller than the sum of its proper divisors (21763237638).

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

21753871098 is a wasteful number, since it uses less digits than its factorization.

21753871098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780549.

The product of its (nonzero) digits is 846720, while the sum is 51.

The spelling of 21753871098 in words is "twenty-one billion, seven hundred fifty-three million, eight hundred seventy-one thousand, ninety-eight".