21443030404 has 12 divisors (see below), whose sum is σ = 37526629644. Its totient is φ = 10721136224.

The previous prime is 21443030377. The next prime is 21443030419. The reversal of 21443030404 is 40403034412.

It can be written as a sum of positive squares in 2 ways, for example, as 11925076804 + 9517953600 = 109202^2 + 97560^2 .

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, 61014 + ... + 215890.

It is an arithmetic number, because the mean of its divisors is an integer number (3127219137).

Almost surely, 2^21443030404 is an apocalyptic number.

It is an amenable number.

21443030404 is a deficient number, since it is larger than the sum of its proper divisors (16083599240).

21443030404 is a wasteful number, since it uses less digits than its factorization.

21443030404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189494 (or 189492 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21443030404 its reverse (40403034412), we get a palindrome (61846064816).

The spelling of 21443030404 in words is "twenty-one billion, four hundred forty-three million, thirty thousand, four hundred four".