21241404296 has 128 divisors (see below), whose sum is σ = 47573568000. Its totient is φ = 8702318592.

The previous prime is 21241404257. The next prime is 21241404299. The reversal of 21241404296 is 69240414212.

It is a super-2 number, since 2×21241404296² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21241404299) 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, 42229181 + ... + 42229683.

It is an arithmetic number, because the mean of its divisors is an integer number (371668500).

Almost surely, 2^21241404296 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 21241404296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23786784000).

21241404296 is an abundant number, since it is smaller than the sum of its proper divisors (26332163704).

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

21241404296 is a wasteful number, since it uses less digits than its factorization.

21241404296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21241404296 in words is "twenty-one billion, two hundred forty-one million, four hundred four thousand, two hundred ninety-six".