16505022120 has 32 divisors (see below), whose sum is σ = 49515066720. Its totient is φ = 4401339200.

The previous prime is 16505022091. The next prime is 16505022137. The reversal of 16505022120 is 2122050561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68770806 + ... + 68771045.

It is an arithmetic number, because the mean of its divisors is an integer number (1547345835).

Almost surely, 2^16505022120 is an apocalyptic number.

16505022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505022120 is an abundant number, since it is smaller than the sum of its proper divisors (33010044600).

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

16505022120 is a wasteful number, since it uses less digits than its factorization.

16505022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137541865 (or 137541861 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 16505022120 its reverse (2122050561), we get a palindrome (18627072681).

The spelling of 16505022120 in words is "sixteen billion, five hundred five million, twenty-two thousand, one hundred twenty".