21133443104 has 48 divisors (see below), whose sum is σ = 44068147200. Its totient is φ = 9941935104.

The previous prime is 21133443061. The next prime is 21133443131. The reversal of 21133443104 is 40134433112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2998817 + ... + 3005855.

It is an arithmetic number, because the mean of its divisors is an integer number (918086400).

Almost surely, 2^21133443104 is an apocalyptic number.

It is an amenable number.

21133443104 is an abundant number, since it is smaller than the sum of its proper divisors (22934704096).

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

21133443104 is a wasteful number, since it uses less digits than its factorization.

21133443104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12585 (or 12577 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21133443104 its reverse (40134433112), we get a palindrome (61267876216).

The spelling of 21133443104 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty-three thousand, one hundred four".