21283889504 has 24 divisors (see below), whose sum is σ = 42183892800. Its totient is φ = 10570519936.

The previous prime is 21283889503. The next prime is 21283889519. The reversal of 21283889504 is 40598838212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21283889503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2227184 + ... + 2236719.

It is an arithmetic number, because the mean of its divisors is an integer number (1757662200).

Almost surely, 2^21283889504 is an apocalyptic number.

It is an amenable number.

21283889504 is a deficient number, since it is larger than the sum of its proper divisors (20900003296).

21283889504 is a wasteful number, since it uses less digits than its factorization.

21283889504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464062 (or 4464054 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 21283889504 in words is "twenty-one billion, two hundred eighty-three million, eight hundred eighty-nine thousand, five hundred four".