1020805682 has 8 divisors (see below), whose sum is σ = 1648993836. Its totient is φ = 471141072.

The previous prime is 1020805673. The next prime is 1020805697. The reversal of 1020805682 is 2865080201.

It can be written as a sum of positive squares in 2 ways, for example, as 1020738601 + 67081 = 31949^2 + 259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 19630853 + ... + 19630904.

Almost surely, 2^1020805682 is an apocalyptic number.

1020805682 is a deficient number, since it is larger than the sum of its proper divisors (628188154).

1020805682 is a wasteful number, since it uses less digits than its factorization.

1020805682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39261772.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1020805682 is about 31950.0497965183. The cubic root of 1020805682 is about 1006.8876783035.

Adding to 1020805682 its reverse (2865080201), we get a palindrome (3885885883).

The spelling of 1020805682 in words is "one billion, twenty million, eight hundred five thousand, six hundred eighty-two".