21113002308 has 48 divisors (see below), whose sum is σ = 50641607744. Its totient is φ = 6841169280.

The previous prime is 21113002307. The next prime is 21113002349. The reversal of 21113002308 is 80320031112.

It is a super-2 number, since 2×21113002308² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21113002307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474663 + ... + 517233.

Almost surely, 2^21113002308 is an apocalyptic number.

It is an amenable number.

21113002308 is an abundant number, since it is smaller than the sum of its proper divisors (29528605436).

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

21113002308 is a wasteful number, since it uses less digits than its factorization.

21113002308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43732 (or 43730 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 21113002308 in words is "twenty-one billion, one hundred thirteen million, two thousand, three hundred eight".