16510012220 has 36 divisors (see below), whose sum is σ = 37543189320. Its totient is φ = 6096003264.

The previous prime is 16510012219. The next prime is 16510012229. The reversal of 16510012220 is 2221001561.

16510012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 16510012192 and 16510012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16510012229) 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 11 ways as a sum of consecutive naturals, for example, 2438930 + ... + 2445689.

It is an arithmetic number, because the mean of its divisors is an integer number (1042866370).

Almost surely, 2^16510012220 is an apocalyptic number.

16510012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16510012220 is an abundant number, since it is smaller than the sum of its proper divisors (21033177100).

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

16510012220 is a wasteful number, since it uses less digits than its factorization.

16510012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884654 (or 4884639 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 16510012220 its reverse (2221001561), we get a palindrome (18731013781).

The spelling of 16510012220 in words is "sixteen billion, five hundred ten million, twelve thousand, two hundred twenty".