21353602204000 has 192 divisors, whose sum is σ = 57802118197824. Its totient is φ = 7688064000000.

The previous prime is 21353602203961. The next prime is 21353602204027. The reversal of 21353602204000 is 40220635312.

It is a self number, because there is not a number n which added to its sum of digits gives 21353602204000.

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, 2041480 + ... + 6846520.

It is an arithmetic number, because the mean of its divisors is an integer number (301052698947).

Almost surely, 2^{21353602204000} is an apocalyptic number.

21353602204000 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 21353602204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28901059098912).

21353602204000 is an abundant number, since it is smaller than the sum of its proper divisors (36448515993824).

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

21353602204000 is a wasteful number, since it uses less digits than its factorization.

21353602204000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805178 (or 4805160 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21353602204000 its reverse (40220635312), we get a palindrome (21393822839312).

The spelling of 21353602204000 in words is "twenty-one trillion, three hundred fifty-three billion, six hundred two million, two hundred four thousand".