16500021120 has 192 divisors, whose sum is σ = 62156568240. Its totient is φ = 3999989760.

The previous prime is 16500021107. The next prime is 16500021127. The reversal of 16500021120 is 2112000561.

16500021120 is a `hidden beast` number, since 1 + 650 + 0 + 0 + 2 + 1 + 12 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16500021093 and 16500021102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16500021127) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 66849 + ... + 193568.

Almost surely, 2^16500021120 is an apocalyptic number.

16500021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16500021120 is an abundant number, since it is smaller than the sum of its proper divisors (45656547120).

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

16500021120 is a wasteful number, since it uses less digits than its factorization.

16500021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260453 (or 260438 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 16500021120 its reverse (2112000561), we get a palindrome (18612021681).

The spelling of 16500021120 in words is "sixteen billion, five hundred million, twenty-one thousand, one hundred twenty".