21641883104 has 24 divisors (see below), whose sum is σ = 42629441400. Its totient is φ = 10815358336.

The previous prime is 21641883089. The next prime is 21641883113. The reversal of 21641883104 is 40138814612.

It is a super-2 number, since 2×21641883104² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111134 + ... + 235869.

It is an arithmetic number, because the mean of its divisors is an integer number (1776226725).

Almost surely, 2^21641883104 is an apocalyptic number.

It is an amenable number.

21641883104 is a deficient number, since it is larger than the sum of its proper divisors (20987558296).

21641883104 is a wasteful number, since it uses less digits than its factorization.

21641883104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348962 (or 348954 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 21641883104 in words is "twenty-one billion, six hundred forty-one million, eight hundred eighty-three thousand, one hundred four".