1983818220 has 24 divisors (see below), whose sum is σ = 5554691184. Its totient is φ = 529018176.

The previous prime is 1983818191. The next prime is 1983818227. The reversal of 1983818220 is 228183891.

It is a super-4 number, since 4×1983818220⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1983818227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16531759 + ... + 16531878.

It is an arithmetic number, because the mean of its divisors is an integer number (231445466).

Almost surely, 2^1983818220 is an apocalyptic number.

1983818220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983818220 is an abundant number, since it is smaller than the sum of its proper divisors (3570872964).

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

1983818220 is a wasteful number, since it uses less digits than its factorization.

1983818220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33063649 (or 33063647 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1983818220 is about 44540.0743151603. The cubic root of 1983818220 is about 1256.5138834286.

The spelling of 1983818220 in words is "one billion, nine hundred eighty-three million, eight hundred eighteen thousand, two hundred twenty".