21441542244 has 12 divisors (see below), whose sum is σ = 50030265264. Its totient is φ = 7147180744.

The previous prime is 21441542203. The next prime is 21441542257. The reversal of 21441542244 is 44224514412.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893397582 + ... + 893397605.

It is an arithmetic number, because the mean of its divisors is an integer number (4169188772).

Almost surely, 2^21441542244 is an apocalyptic number.

It is an amenable number.

21441542244 is an abundant number, since it is smaller than the sum of its proper divisors (28588723020).

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

21441542244 is a wasteful number, since it uses less digits than its factorization.

21441542244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786795194 (or 1786795192 counting only the distinct ones).

The product of its digits is 40960, while the sum is 33.

The spelling of 21441542244 in words is "twenty-one billion, four hundred forty-one million, five hundred forty-two thousand, two hundred forty-four".