21323022300 has 216 divisors, whose sum is σ = 68821116000. Its totient is φ = 5518056960.

The previous prime is 21323022283. The next prime is 21323022359. The reversal of 21323022300 is 322032312.

It is a happy number.

21323022300 is a `hidden beast` number, since 2 + 132 + 302 + 230 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19946166 + ... + 19947234.

Almost surely, 2^21323022300 is an apocalyptic number.

21323022300 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 21323022300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34410558000).

21323022300 is an abundant number, since it is smaller than the sum of its proper divisors (47498093700).

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

21323022300 is a wasteful number, since it uses less digits than its factorization.

21323022300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 1715 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21323022300 its reverse (322032312), we get a palindrome (21645054612).

The spelling of 21323022300 in words is "twenty-one billion, three hundred twenty-three million, twenty-two thousand, three hundred".