21004104405200 has 240 divisors, whose sum is σ = 58720403748864. Its totient is φ = 7071093849600.

The previous prime is 21004104405173. The next prime is 21004104405209. The reversal of 21004104405200 is 250440140012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004104405209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58163597 + ... + 58523603.

Almost surely, 2^{21004104405200} is an apocalyptic number.

21004104405200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21004104405200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29360201874432).

21004104405200 is an abundant number, since it is smaller than the sum of its proper divisors (37716299343664).

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

21004104405200 is a wasteful number, since it uses less digits than its factorization.

21004104405200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360410 (or 360399 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 21004104405200 its reverse (250440140012), we get a palindrome (21254544545212).

The spelling of 21004104405200 in words is "twenty-one trillion, four billion, one hundred four million, four hundred five thousand, two hundred".