21313200000 has 192 divisors, whose sum is σ = 70765939440. Its totient is φ = 5683200000.

The previous prime is 21313199983. The next prime is 21313200037. The reversal of 21313200000 is 231312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1191120 + ... + 1208880.

Almost surely, 2^21313200000 is an apocalyptic number.

21313200000 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 21313200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35382969720).

21313200000 is an abundant number, since it is smaller than the sum of its proper divisors (49452739440).

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

21313200000 is an frugal number, since it uses more digits than its factorization.

21313200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17803 (or 17771 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21313200000 its reverse (231312), we get a palindrome (21313431312).

The spelling of 21313200000 in words is "twenty-one billion, three hundred thirteen million, two hundred thousand".