82020520 has 16 divisors (see below), whose sum is σ = 184546260. Its totient is φ = 32808192.

The previous prime is 82020503. The next prime is 82020559. The reversal of 82020520 is 2502028.

It can be written as a sum of positive squares in 2 ways, for example, as 76422564 + 5597956 = 8742^2 + 2366^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1025217 + ... + 1025296.

Almost surely, 2^82020520 is an apocalyptic number.

It is an amenable number.

82020520 is an abundant number, since it is smaller than the sum of its proper divisors (102525740).

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

82020520 is a wasteful number, since it uses less digits than its factorization.

82020520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050524 (or 2050520 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 82020520 is about 9056.5180947205. The cubic root of 82020520 is about 434.4843848878.

Adding to 82020520 its reverse (2502028), we get a palindrome (84522548).

The spelling of 82020520 in words is "eighty-two million, twenty thousand, five hundred twenty".