21230424404 has 48 divisors (see below), whose sum is σ = 42690211200. Its totient is φ = 9049743360.

The previous prime is 21230424403. The next prime is 21230424427. The reversal of 21230424404 is 40442403212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230424401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234259 + ... + 4239269.

It is an arithmetic number, because the mean of its divisors is an integer number (889379400).

Almost surely, 2^21230424404 is an apocalyptic number.

It is an amenable number.

21230424404 is an abundant number, since it is smaller than the sum of its proper divisors (21459786796).

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

21230424404 is a wasteful number, since it uses less digits than its factorization.

21230424404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808 (or 5806 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21230424404 its reverse (40442403212), we get a palindrome (61672827616).

The spelling of 21230424404 in words is "twenty-one billion, two hundred thirty million, four hundred twenty-four thousand, four hundred four".