21313032300 has 216 divisors, whose sum is σ = 78412335456. Its totient is φ = 4739834880.

The previous prime is 21313032289. The next prime is 21313032313. The reversal of 21313032300 is 323031312.

21313032300 is a `hidden beast` number, since 2 + 131 + 303 + 230 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 71 ways as a sum of consecutive naturals, for example, 187384 + ... + 278816.

Almost surely, 2^21313032300 is an apocalyptic number.

21313032300 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 21313032300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39206167728).

21313032300 is an abundant number, since it is smaller than the sum of its proper divisors (57099303156).

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

21313032300 is a wasteful number, since it uses less digits than its factorization.

21313032300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91497 (or 91487 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21313032300 its reverse (323031312), we get a palindrome (21636063612).

The spelling of 21313032300 in words is "twenty-one billion, three hundred thirteen million, thirty-two thousand, three hundred".