21342200202 has 96 divisors (see below), whose sum is σ = 49155724800. Its totient is φ = 6681072384.

The previous prime is 21342200179. The next prime is 21342200203. The reversal of 21342200202 is 20200224312.

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 (21342200203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4094574 + ... + 4099782.

It is an arithmetic number, because the mean of its divisors is an integer number (512038800).

Almost surely, 2^21342200202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21342200202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24577862400).

21342200202 is an abundant number, since it is smaller than the sum of its proper divisors (27813524598).

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

21342200202 is a wasteful number, since it uses less digits than its factorization.

21342200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21342200202 its reverse (20200224312), we get a palindrome (41542424514).

The spelling of 21342200202 in words is "twenty-one billion, three hundred forty-two million, two hundred thousand, two hundred two".