21443110004 has 12 divisors (see below), whose sum is σ = 39732821604. Its totient is φ = 10090875264.

The previous prime is 21443109991. The next prime is 21443110019. The reversal of 21443110004 is 40001134412.

It can be written as a sum of positive squares in 2 ways, for example, as 15092613904 + 6350496100 = 122852^2 + 79690^2 .

It is a congruent number.

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, 157669859 + ... + 157669994.

It is an arithmetic number, because the mean of its divisors is an integer number (3311068467).

Almost surely, 2^21443110004 is an apocalyptic number.

It is an amenable number.

21443110004 is a deficient number, since it is larger than the sum of its proper divisors (18289711600).

21443110004 is a wasteful number, since it uses less digits than its factorization.

21443110004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315339874 (or 315339872 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21443110004 its reverse (40001134412), we get a palindrome (61444244416).

The spelling of 21443110004 in words is "twenty-one billion, four hundred forty-three million, one hundred ten thousand, four".