20085445928 has 16 divisors (see below), whose sum is σ = 37684025280. Its totient is φ = 10036372528.

The previous prime is 20085445921. The next prime is 20085445943. The reversal of 20085445928 is 82954458002.

It is a super-2 number, since 2×20085445928² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20085445921) by changing a digit.

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, 780350 + ... + 805677.

It is an arithmetic number, because the mean of its divisors is an integer number (2355251580).

Almost surely, 2^20085445928 is an apocalyptic number.

It is an amenable number.

20085445928 is a deficient number, since it is larger than the sum of its proper divisors (17598579352).

20085445928 is a wasteful number, since it uses less digits than its factorization.

20085445928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587616 (or 1587612 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 20085445928 in words is "twenty billion, eighty-five million, four hundred forty-five thousand, nine hundred twenty-eight".