1820020204 has 48 divisors (see below), whose sum is σ = 3420670176. Its totient is φ = 844313600.

The previous prime is 1820020183. The next prime is 1820020211. The reversal of 1820020204 is 4020200281.

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, 1540494 + ... + 1541674.

It is an arithmetic number, because the mean of its divisors is an integer number (71263962).

Almost surely, 2^1820020204 is an apocalyptic number.

It is an amenable number.

1820020204 is a deficient number, since it is larger than the sum of its proper divisors (1600649972).

1820020204 is a wasteful number, since it uses less digits than its factorization.

1820020204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1820020204 is about 42661.6948092783. The cubic root of 1820020204 is about 1220.9336676152.

Adding to 1820020204 its reverse (4020200281), we get a palindrome (5840220485).

The spelling of 1820020204 in words is "one billion, eight hundred twenty million, twenty thousand, two hundred four".