21144404034444 has 24 divisors (see below), whose sum is σ = 49515054461488. Its totient is φ = 7022690147520.

The previous prime is 21144404034379. The next prime is 21144404034449. The reversal of 21144404034444 is 44443040444112.

It is not an unprimeable number, because it can be changed into a prime (21144404034449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180562867 + ... + 3180569514.

Almost surely, 2^{21144404034444} is an apocalyptic number.

It is an amenable number.

21144404034444 is an abundant number, since it is smaller than the sum of its proper divisors (28370650427044).

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

21144404034444 is a wasteful number, since it uses less digits than its factorization.

21144404034444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361132665 (or 6361132663 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 39.

Adding to 21144404034444 its reverse (44443040444112), we get a palindrome (65587444478556).

The spelling of 21144404034444 in words is "twenty-one trillion, one hundred forty-four billion, four hundred four million, thirty-four thousand, four hundred forty-four".