20328825285 has 16 divisors (see below), whose sum is σ = 36140134080. Its totient is φ = 10842040080.

The previous prime is 20328825271. The next prime is 20328825311. The reversal of 20328825285 is 58252882302.

20328825285 is a `hidden beast` number, since 20 + 3 + 28 + 82 + 528 + 5 = 666.

It is not a de Polignac number, because 20328825285 - 2⁴ = 20328825269 is a prime.

It is a super-2 number, since 2×20328825285² (a number of 21 digits) contains 22 as substring.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20328825285.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 75291811 + ... + 75292080.

It is an arithmetic number, because the mean of its divisors is an integer number (2258758380).

Almost surely, 2^20328825285 is an apocalyptic number.

It is an amenable number.

20328825285 is a deficient number, since it is larger than the sum of its proper divisors (15811308795).

20328825285 is a wasteful number, since it uses less digits than its factorization.

20328825285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150583905 (or 150583899 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 20328825285 in words is "twenty billion, three hundred twenty-eight million, eight hundred twenty-five thousand, two hundred eighty-five".