1020165020 has 48 divisors (see below), whose sum is σ = 2466313920. Its totient is φ = 347211264.

The previous prime is 1020165011. The next prime is 1020165049. The reversal of 1020165020 is 205610201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020165020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7415 + ... + 45774.

It is an arithmetic number, because the mean of its divisors is an integer number (51381540).

Almost surely, 2^1020165020 is an apocalyptic number.

1020165020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020165020 is an abundant number, since it is smaller than the sum of its proper divisors (1446148900).

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

1020165020 is a wasteful number, since it uses less digits than its factorization.

1020165020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53342 (or 53340 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1020165020 is about 31940.0222291720. The cubic root of 1020165020 is about 1006.6769918876.

Adding to 1020165020 its reverse (205610201), we get a palindrome (1225775221).

The spelling of 1020165020 in words is "one billion, twenty million, one hundred sixty-five thousand, twenty".