16020520 has 32 divisors (see below), whose sum is σ = 36426600. Its totient is φ = 6340608.

The previous prime is 16020503. The next prime is 16020523. The reversal of 16020520 is 2502061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12830724 + 3189796 = 3582^2 + 1786^2 .

It is a super-2 number, since 2×16020520² = 513314122140800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16020494 and 16020503.

It is not an unprimeable number, because it can be changed into a prime (16020523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816 + ... + 5944.

Almost surely, 2^16020520 is an apocalyptic number.

16020520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16020520 is an abundant number, since it is smaller than the sum of its proper divisors (20406080).

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

16020520 is a wasteful number, since it uses less digits than its factorization.

16020520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237 (or 4233 counting only the distinct ones).

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

The square root of 16020520 is about 4002.5641781238. The cubic root of 16020520 is about 252.0918872098.

Adding to 16020520 its reverse (2502061), we get a palindrome (18522581).

It can be divided in two parts, 160205 and 20, that multiplied together give a square (3204100 = 1790²).

The spelling of 16020520 in words is "sixteen million, twenty thousand, five hundred twenty".