1820841904 has 20 divisors (see below), whose sum is σ = 4031864464. Its totient is φ = 780360768.

The previous prime is 1820841889. The next prime is 1820841917. The reversal of 1820841904 is 4091480281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8128647 + ... + 8128870.

Almost surely, 2^1820841904 is an apocalyptic number.

1820841904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1820841904 is an abundant number, since it is smaller than the sum of its proper divisors (2211022560).

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

1820841904 is a wasteful number, since it uses less digits than its factorization.

1820841904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16257532 (or 16257526 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1820841904 is about 42671.3241416294. The cubic root of 1820841904 is about 1221.1173817391.

The spelling of 1820841904 in words is "one billion, eight hundred twenty million, eight hundred forty-one thousand, nine hundred four".