21042875404 has 12 divisors (see below), whose sum is σ = 36834263928. Its totient is φ = 10518800000.

The previous prime is 21042875387. The next prime is 21042875411. The reversal of 21042875404 is 40457824012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641422 + ... + 673429.

It is an arithmetic number, because the mean of its divisors is an integer number (3069521994).

Almost surely, 2^21042875404 is an apocalyptic number.

It is an amenable number.

21042875404 is a deficient number, since it is larger than the sum of its proper divisors (15791388524).

21042875404 is a wasteful number, since it uses less digits than its factorization.

21042875404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318856 (or 1318854 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 37.

The spelling of 21042875404 in words is "twenty-one billion, forty-two million, eight hundred seventy-five thousand, four hundred four".