21144103404 has 12 divisors (see below), whose sum is σ = 49336241304. Its totient is φ = 7048034464.

The previous prime is 21144103403. The next prime is 21144103417. The reversal of 21144103404 is 40430144112.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21144103403) 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, 881004297 + ... + 881004320.

It is an arithmetic number, because the mean of its divisors is an integer number (4111353442).

Almost surely, 2^21144103404 is an apocalyptic number.

It is an amenable number.

21144103404 is an abundant number, since it is smaller than the sum of its proper divisors (28192137900).

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

21144103404 is a wasteful number, since it uses less digits than its factorization.

21144103404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762008624 (or 1762008622 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21144103404 its reverse (40430144112), we get a palindrome (61574247516).

The spelling of 21144103404 in words is "twenty-one billion, one hundred forty-four million, one hundred three thousand, four hundred four".