21303233100 has 216 divisors, whose sum is σ = 67987679760. Its totient is φ = 5578560000.

The previous prime is 21303233089. The next prime is 21303233117. The reversal of 21303233100 is 133230312.

21303233100 is a `hidden beast` number, since 2 + 1 + 30 + 323 + 310 + 0 = 666.

It is a super-2 number, since 2×21303233100² (a number of 21 digits) contains 22 as substring.

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, 11907006 + ... + 11908794.

Almost surely, 2^21303233100 is an apocalyptic number.

21303233100 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 21303233100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33993839880).

21303233100 is an abundant number, since it is smaller than the sum of its proper divisors (46684446660).

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

21303233100 is a wasteful number, since it uses less digits than its factorization.

21303233100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2031 counting only the distinct ones).

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

Adding to 21303233100 its reverse (133230312), we get a palindrome (21436463412).

The spelling of 21303233100 in words is "twenty-one billion, three hundred three million, two hundred thirty-three thousand, one hundred".