20385512 has 16 divisors (see below), whose sum is σ = 43683360. Its totient is φ = 8736624.

The previous prime is 20385511. The next prime is 20385517. The reversal of 20385512 is 21558302.

It is not an unprimeable number, because it can be changed into a prime (20385511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181958 + ... + 182069.

It is an arithmetic number, because the mean of its divisors is an integer number (2730210).

Almost surely, 2^20385512 is an apocalyptic number.

It is an amenable number.

20385512 is an abundant number, since it is smaller than the sum of its proper divisors (23297848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20385512 is a wasteful number, since it uses less digits than its factorization.

20385512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364040 (or 364036 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20385512 is about 4515.0317828339. The cubic root of 20385512 is about 273.1747417639.

The spelling of 20385512 in words is "twenty million, three hundred eighty-five thousand, five hundred twelve".