1820182020 has 48 divisors (see below), whose sum is σ = 5118422400. Its totient is φ = 483294976.

The previous prime is 1820181977. The next prime is 1820182087. The reversal of 1820182020 is 202810281.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51120 + ... + 79079.

It is an arithmetic number, because the mean of its divisors is an integer number (106633800).

Almost surely, 2^1820182020 is an apocalyptic number.

1820182020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820182020 is an abundant number, since it is smaller than the sum of its proper divisors (3298240380).

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

1820182020 is a wasteful number, since it uses less digits than its factorization.

1820182020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130444 (or 130442 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1820182020 is about 42663.5912693716. The cubic root of 1820182020 is about 1220.9698505006.

The spelling of 1820182020 in words is "one billion, eight hundred twenty million, one hundred eighty-two thousand, twenty".