82580018 has 4 divisors (see below), whose sum is σ = 123870030. Its totient is φ = 41290008.

The previous prime is 82579969. The next prime is 82580021. The reversal of 82580018 is 81008528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 34374769 = 6943^2 + 5863^2 .

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 as a sum of consecutive naturals, namely, 20645003 + ... + 20645006.

Almost surely, 2^82580018 is an apocalyptic number.

82580018 is a deficient number, since it is larger than the sum of its proper divisors (41290012).

82580018 is a wasteful number, since it uses less digits than its factorization.

82580018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41290011.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 82580018 is about 9087.3548406563. The cubic root of 82580018 is about 435.4700832685.

The spelling of 82580018 in words is "eighty-two million, five hundred eighty thousand, eighteen".