21203333000 has 64 divisors (see below), whose sum is σ = 49677591600. Its totient is φ = 8470771200.

The previous prime is 21203332999. The next prime is 21203333009. The reversal of 21203333000 is 33330212.

It can be written as a sum of positive squares in 8 ways, for example, as 112741924 + 21090591076 = 10618^2 + 145226^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21203333000.

It is not an unprimeable number, because it can be changed into a prime (21203333009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816212 + ... + 841788.

Almost surely, 2^21203333000 is an apocalyptic number.

21203333000 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 21203333000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24838795800).

21203333000 is an abundant number, since it is smaller than the sum of its proper divisors (28474258600).

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

21203333000 is a wasteful number, since it uses less digits than its factorization.

21203333000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26427 (or 26413 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 21203333000 its reverse (33330212), we get a palindrome (21236663212).

The spelling of 21203333000 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand".