21444502210004 has 12 divisors (see below), whose sum is σ = 37661430039828. Its totient is φ = 10684093627200.

The previous prime is 21444502209997. The next prime is 21444502210009. The reversal of 21444502210004 is 40001220544412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9633251647504 + 11811250562500 = 3103748^2 + 3436750^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444502210009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9539368187 + ... + 9539370434.

It is an arithmetic number, because the mean of its divisors is an integer number (3138452503319).

Almost surely, 2^{21444502210004} is an apocalyptic number.

It is an amenable number.

21444502210004 is a deficient number, since it is larger than the sum of its proper divisors (16216927829824).

21444502210004 is a wasteful number, since it uses less digits than its factorization.

21444502210004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19078738906 (or 19078738904 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 21444502210004 its reverse (40001220544412), we get a palindrome (61445722754416).

The spelling of 21444502210004 in words is "twenty-one trillion, four hundred forty-four billion, five hundred two million, two hundred ten thousand, four".