21344203232 has 72 divisors (see below), whose sum is σ = 47477436552. Its totient is φ = 9367232000.

The previous prime is 21344203193. The next prime is 21344203247. The reversal of 21344203232 is 23230244312.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259982 + ... + 332082.

It is an arithmetic number, because the mean of its divisors is an integer number (659408841).

Almost surely, 2^21344203232 is an apocalyptic number.

21344203232 is a gapful number since it is divisible by the number (22) 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 21344203232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23738718276).

21344203232 is an abundant number, since it is smaller than the sum of its proper divisors (26133233320).

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

21344203232 is a wasteful number, since it uses less digits than its factorization.

21344203232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72180 (or 72143 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21344203232 its reverse (23230244312), we get a palindrome (44574447544).

The spelling of 21344203232 in words is "twenty-one billion, three hundred forty-four million, two hundred three thousand, two hundred thirty-two".