21389285704 has 64 divisors (see below), whose sum is σ = 41991955200. Its totient is φ = 10200900864.

The previous prime is 21389285693. The next prime is 21389285719. The reversal of 21389285704 is 40758298312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13309269 + ... + 13310875.

It is an arithmetic number, because the mean of its divisors is an integer number (656124300).

Almost surely, 2^21389285704 is an apocalyptic number.

It is an amenable number.

21389285704 is a deficient number, since it is larger than the sum of its proper divisors (20602669496).

21389285704 is a wasteful number, since it uses less digits than its factorization.

21389285704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 21389285704 in words is "twenty-one billion, three hundred eighty-nine million, two hundred eighty-five thousand, seven hundred four".