21325068585 has 64 divisors (see below), whose sum is σ = 40628943360. Its totient is φ = 10584794880.

The previous prime is 21325068577. The next prime is 21325068587. The reversal of 21325068585 is 58586052312.

21325068585 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 5 + 0 + 68 + 585 = 666.

It is not a de Polignac number, because 21325068585 - 2³ = 21325068577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21325068585.

It is not an unprimeable number, because it can be changed into a prime (21325068587) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22075 + ... + 207695.

It is an arithmetic number, because the mean of its divisors is an integer number (634827240).

Almost surely, 2^21325068585 is an apocalyptic number.

It is an amenable number.

21325068585 is a deficient number, since it is larger than the sum of its proper divisors (19303874775).

21325068585 is a wasteful number, since it uses less digits than its factorization.

21325068585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185695 (or 185689 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 21325068585 in words is "twenty-one billion, three hundred twenty-five million, sixty-eight thousand, five hundred eighty-five".