21433211300 has 72 divisors (see below), whose sum is σ = 47050863552. Its totient is φ = 8474128000.

The previous prime is 21433211251. The next prime is 21433211323. The reversal of 21433211300 is 311233412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3442190 + ... + 3448410.

It is an arithmetic number, because the mean of its divisors is an integer number (653484216).

Almost surely, 2^21433211300 is an apocalyptic number.

21433211300 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 21433211300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23525431776).

21433211300 is an abundant number, since it is smaller than the sum of its proper divisors (25617652252).

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

21433211300 is a wasteful number, since it uses less digits than its factorization.

21433211300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629 (or 6622 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21433211300 its reverse (311233412), we get a palindrome (21744444712).

The spelling of 21433211300 in words is "twenty-one billion, four hundred thirty-three million, two hundred eleven thousand, three hundred".