21275200404 has 36 divisors (see below), whose sum is σ = 53784435796. Its totient is φ = 7091013888.

The previous prime is 21275200381. The next prime is 21275200423. The reversal of 21275200404 is 40400257212.

It can be written as a sum of positive squares in 2 ways, for example, as 14209116804 + 7066083600 = 119202^2 + 84060^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 423822 + ... + 471354.

Almost surely, 2^21275200404 is an apocalyptic number.

It is an amenable number.

21275200404 is an abundant number, since it is smaller than the sum of its proper divisors (32509235392).

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

21275200404 is a wasteful number, since it uses less digits than its factorization.

21275200404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59976 (or 59971 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

Adding to 21275200404 its reverse (40400257212), we get a palindrome (61675457616).

The spelling of 21275200404 in words is "twenty-one billion, two hundred seventy-five million, two hundred thousand, four hundred four".