21313543352 has 32 divisors (see below), whose sum is σ = 40787558400. Its totient is φ = 10438987104.

The previous prime is 21313543351. The next prime is 21313543369. The reversal of 21313543352 is 25334531312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313543351) 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 7 ways as a sum of consecutive naturals, for example, 52508 + ... + 213035.

It is an arithmetic number, because the mean of its divisors is an integer number (1274611200).

Almost surely, 2^21313543352 is an apocalyptic number.

It is an amenable number.

21313543352 is a deficient number, since it is larger than the sum of its proper divisors (19474015048).

21313543352 is a wasteful number, since it uses less digits than its factorization.

21313543352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265755 (or 265751 counting only the distinct ones).

The product of its digits is 32400, while the sum is 32.

The spelling of 21313543352 in words is "twenty-one billion, three hundred thirteen million, five hundred forty-three thousand, three hundred fifty-two".