16502020 has 12 divisors (see below), whose sum is σ = 34654284. Its totient is φ = 6600800.

The previous prime is 16501997. The next prime is 16502023. The reversal of 16502020 is 2020561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11128896 + 5373124 = 3336^2 + 2318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16501985 and 16502003.

It is not an unprimeable number, because it can be changed into a prime (16502023) 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, 412531 + ... + 412570.

It is an arithmetic number, because the mean of its divisors is an integer number (2887857).

Almost surely, 2^16502020 is an apocalyptic number.

16502020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16502020 is an abundant number, since it is smaller than the sum of its proper divisors (18152264).

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

16502020 is a wasteful number, since it uses less digits than its factorization.

16502020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825110 (or 825108 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 16502020 is about 4062.2678395202. The cubic root of 16502020 is about 254.5925570688.

Adding to 16502020 its reverse (2020561), we get a palindrome (18522581).

The spelling of 16502020 in words is "sixteen million, five hundred two thousand, twenty".