21444041535320 has 64 divisors (see below), whose sum is σ = 51090202219680. Its totient is φ = 8072588425216.

The previous prime is 21444041535221. The next prime is 21444041535467. The reversal of 21444041535320 is 2353514044412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11091842 + ... + 12880878.

Almost surely, 2^{21444041535320} is an apocalyptic number.

21444041535320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21444041535320 is an abundant number, since it is smaller than the sum of its proper divisors (29646160684360).

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

21444041535320 is a wasteful number, since it uses less digits than its factorization.

21444041535320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806692 (or 1806688 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 21444041535320 its reverse (2353514044412), we get a palindrome (23797555579732).

The spelling of 21444041535320 in words is "twenty-one trillion, four hundred forty-four billion, forty-one million, five hundred thirty-five thousand, three hundred twenty".