1804021850 has 24 divisors (see below), whose sum is σ = 3471189660. Its totient is φ = 696725120.

The previous prime is 1804021841. The next prime is 1804021867. The reversal of 1804021850 is 581204081.

It can be written as a sum of positive squares in 6 ways, for example, as 567725929 + 1236295921 = 23827^2 + 35161^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620627 + ... + 623526.

Almost surely, 2^1804021850 is an apocalyptic number.

1804021850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1804021850 is a deficient number, since it is larger than the sum of its proper divisors (1667167810).

1804021850 is a wasteful number, since it uses less digits than its factorization.

1804021850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244194 (or 1244189 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1804021850 is about 42473.7783814909. The cubic root of 1804021850 is about 1217.3457142227.

The spelling of 1804021850 in words is "one billion, eight hundred four million, twenty-one thousand, eight hundred fifty".