1868331820 has 12 divisors (see below), whose sum is σ = 3923496864. Its totient is φ = 747332720.

The previous prime is 1868331797. The next prime is 1868331863. The reversal of 1868331820 is 281338681.

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 3 ways as a sum of consecutive naturals, for example, 46708276 + ... + 46708315.

It is an arithmetic number, because the mean of its divisors is an integer number (326958072).

Almost surely, 2^1868331820 is an apocalyptic number.

1868331820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1868331820 is an abundant number, since it is smaller than the sum of its proper divisors (2055165044).

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

1868331820 is a wasteful number, since it uses less digits than its factorization.

1868331820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93416600 (or 93416598 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1868331820 is about 43224.2040990924. The cubic root of 1868331820 is about 1231.6425100891.

The spelling of 1868331820 in words is "one billion, eight hundred sixty-eight million, three hundred thirty-one thousand, eight hundred twenty".