21369001404 has 24 divisors (see below), whose sum is σ = 49994689360. Its totient is φ = 7103902464.

The previous prime is 21369001387. The next prime is 21369001457. The reversal of 21369001404 is 40410096312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2382589 + ... + 2391540.

Almost surely, 2^21369001404 is an apocalyptic number.

It is an amenable number.

21369001404 is an abundant number, since it is smaller than the sum of its proper divisors (28625687956).

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

21369001404 is a wasteful number, since it uses less digits than its factorization.

21369001404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4774509 (or 4774507 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 21369001404 its reverse (40410096312), we get a palindrome (61779097716).

The spelling of 21369001404 in words is "twenty-one billion, three hundred sixty-nine million, one thousand, four hundred four".