21282769804 has 12 divisors (see below), whose sum is σ = 37248374800. Its totient is φ = 10640377008.

The previous prime is 21282769789. The next prime is 21282769811. The reversal of 21282769804 is 40896728212.

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 3 ways as a sum of consecutive naturals, for example, 203424 + ... + 289735.

Almost surely, 2^21282769804 is an apocalyptic number.

It is an amenable number.

21282769804 is a deficient number, since it is larger than the sum of its proper divisors (15965604996).

21282769804 is a wasteful number, since it uses less digits than its factorization.

21282769804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503952 (or 503950 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 21282769804 in words is "twenty-one billion, two hundred eighty-two million, seven hundred sixty-nine thousand, eight hundred four".