21323133300 has 216 divisors, whose sum is σ = 72475402944. Its totient is φ = 4741493760.

The previous prime is 21323133283. The next prime is 21323133323. The reversal of 21323133300 is 333132312.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 2871192 + ... + 2878608.

Almost surely, 2^21323133300 is an apocalyptic number.

21323133300 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 21323133300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36237701472).

21323133300 is an abundant number, since it is smaller than the sum of its proper divisors (51152269644).

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

21323133300 is a wasteful number, since it uses less digits than its factorization.

21323133300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515 (or 7471 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21323133300 its reverse (333132312), we get a palindrome (21656265612).

The spelling of 21323133300 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirty-three thousand, three hundred".