21369004184 has 128 divisors (see below), whose sum is σ = 45882063360. Its totient is φ = 9244800000.

The previous prime is 21369004171. The next prime is 21369004193. The reversal of 21369004184 is 48140096312.

It is a super-3 number, since 3×21369004184³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33232967 + ... + 33233609.

It is an arithmetic number, because the mean of its divisors is an integer number (358453620).

Almost surely, 2^21369004184 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 21369004184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22941031680).

21369004184 is an abundant number, since it is smaller than the sum of its proper divisors (24513059176).

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

21369004184 is a wasteful number, since it uses less digits than its factorization.

21369004184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 21369004184 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, one hundred eighty-four".