21941089604 has 48 divisors (see below), whose sum is σ = 45342796800. Its totient is φ = 9090938880.

The previous prime is 21941089589. The next prime is 21941089649. The reversal of 21941089604 is 40698014912.

It is a super-2 number, since 2×21941089604² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 898484 + ... + 922580.

It is an arithmetic number, because the mean of its divisors is an integer number (944641600).

Almost surely, 2^21941089604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21941089604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22671398400).

21941089604 is an abundant number, since it is smaller than the sum of its proper divisors (23401707196).

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

21941089604 is a wasteful number, since it uses less digits than its factorization.

21941089604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25188 (or 25186 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 21941089604 in words is "twenty-one billion, nine hundred forty-one million, eighty-nine thousand, six hundred four".