16385866920 has 64 divisors (see below), whose sum is σ = 54619560000. Its totient is φ = 4369564224.

The previous prime is 16385866867. The next prime is 16385866921. The reversal of 16385866920 is 2966858361.

It is a happy number.

16385866920 is a `hidden beast` number, since 1 + 6 + 38 + 586 + 6 + 9 + 20 = 666.

16385866920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16385866921) 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 15 ways as a sum of consecutive naturals, for example, 7584970 + ... + 7587129.

It is an arithmetic number, because the mean of its divisors is an integer number (853430625).

Almost surely, 2^16385866920 is an apocalyptic number.

16385866920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16385866920 is an abundant number, since it is smaller than the sum of its proper divisors (38233693080).

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

16385866920 is a wasteful number, since it uses less digits than its factorization.

16385866920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15172119 (or 15172109 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 16385866920 in words is "sixteen billion, three hundred eighty-five million, eight hundred sixty-six thousand, nine hundred twenty".