21228809089404 has 24 divisors (see below), whose sum is σ = 56610157571968. Its totient is φ = 6065374025520.

The previous prime is 21228809089373. The next prime is 21228809089459. The reversal of 21228809089404 is 40498090882212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126361958782 + ... + 126361958949.

Almost surely, 2^{21228809089404} is an apocalyptic number.

It is an amenable number.

21228809089404 is an abundant number, since it is smaller than the sum of its proper divisors (35381348482564).

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

21228809089404 is a wasteful number, since it uses less digits than its factorization.

21228809089404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252723917745 (or 252723917743 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 57.

The spelling of 21228809089404 in words is "twenty-one trillion, two hundred twenty-eight billion, eight hundred nine million, eighty-nine thousand, four hundred four".