21423041104 has 20 divisors (see below), whose sum is σ = 41535064180. Its totient is φ = 10704314880.

The previous prime is 21423041099. The next prime is 21423041111. The reversal of 21423041104 is 40114032412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8271538704 + 13151502400 = 90948^2 + 114680^2 .

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, 425787 + ... + 473434.

It is an arithmetic number, because the mean of its divisors is an integer number (2076753209).

Almost surely, 2^21423041104 is an apocalyptic number.

It is an amenable number.

21423041104 is a deficient number, since it is larger than the sum of its proper divisors (20112023076).

21423041104 is a wasteful number, since it uses less digits than its factorization.

21423041104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900718 (or 900712 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21423041104 its reverse (40114032412), we get a palindrome (61537073516).

The spelling of 21423041104 in words is "twenty-one billion, four hundred twenty-three million, forty-one thousand, one hundred four".