21113603152 has 40 divisors (see below), whose sum is σ = 43412846400. Its totient is φ = 9913124352.

The previous prime is 21113603143. The next prime is 21113603167. The reversal of 21113603152 is 25130631112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30999 + ... + 207817.

It is an arithmetic number, because the mean of its divisors is an integer number (1085321160).

Almost surely, 2^21113603152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21113603152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21706423200).

21113603152 is an abundant number, since it is smaller than the sum of its proper divisors (22299243248).

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

21113603152 is a wasteful number, since it uses less digits than its factorization.

21113603152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177283 (or 177277 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 21113603152 in words is "twenty-one billion, one hundred thirteen million, six hundred three thousand, one hundred fifty-two".