82018520 has 32 divisors (see below), whose sum is σ = 185159520. Its totient is φ = 32697600.

The previous prime is 82018513. The next prime is 82018537. The reversal of 82018520 is 2581028.

It is a self number, because there is not a number n which added to its sum of digits gives 82018520.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9245 + ... + 15795.

It is an arithmetic number, because the mean of its divisors is an integer number (5786235).

Almost surely, 2^82018520 is an apocalyptic number.

It is an amenable number.

82018520 is an abundant number, since it is smaller than the sum of its proper divisors (103141000).

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

82018520 is a wasteful number, since it uses less digits than its factorization.

82018520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875 (or 6871 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 82018520 is about 9056.4076763361. The cubic root of 82018520 is about 434.4808533494.

Adding to 82018520 its reverse (2581028), we get a palindrome (84599548).

The spelling of 82018520 in words is "eighty-two million, eighteen thousand, five hundred twenty".