21330203202 has 112 divisors (see below), whose sum is σ = 59808330432. Its totient is φ = 5540283360.

The previous prime is 21330203177. The next prime is 21330203203. The reversal of 21330203202 is 20230203312.

It is a happy number.

It is a super-2 number, since 2×21330203202² (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 not an unprimeable number, because it can be changed into a prime (21330203203) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 17268 + ... + 207264.

Almost surely, 2^21330203202 is an apocalyptic number.

21330203202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330203202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29904165216).

21330203202 is an abundant number, since it is smaller than the sum of its proper divisors (38478127230).

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

21330203202 is a wasteful number, since it uses less digits than its factorization.

21330203202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190035 (or 190020 counting only the distinct ones).

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

Adding to 21330203202 its reverse (20230203312), we get a palindrome (41560406514).

The spelling of 21330203202 in words is "twenty-one billion, three hundred thirty million, two hundred three thousand, two hundred two".