21113983352 has 128 divisors (see below), whose sum is σ = 50099212800. Its totient is φ = 8103321600.

The previous prime is 21113983351. The next prime is 21113983361. The reversal of 21113983352 is 25338931112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113983351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19352327 + ... + 19353417.

It is an arithmetic number, because the mean of its divisors is an integer number (391400100).

Almost surely, 2^21113983352 is an apocalyptic number.

21113983352 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 21113983352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25049606400).

21113983352 is an abundant number, since it is smaller than the sum of its proper divisors (28985229448).

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

21113983352 is a wasteful number, since it uses less digits than its factorization.

21113983352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1553 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The spelling of 21113983352 in words is "twenty-one billion, one hundred thirteen million, nine hundred eighty-three thousand, three hundred fifty-two".