1830201820 has 24 divisors (see below), whose sum is σ = 3883050864. Its totient is φ = 724532736.

The previous prime is 1830201817. The next prime is 1830201851. The reversal of 1830201820 is 281020381.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 469762 + ... + 473641.

It is an arithmetic number, because the mean of its divisors is an integer number (161793786).

Almost surely, 2^1830201820 is an apocalyptic number.

1830201820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1830201820 is an abundant number, since it is smaller than the sum of its proper divisors (2052849044).

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

1830201820 is a wasteful number, since it uses less digits than its factorization.

1830201820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943509 (or 943507 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1830201820 is about 42780.8581026608. The cubic root of 1830201820 is about 1223.2061641392.

The spelling of 1830201820 in words is "one billion, eight hundred thirty million, two hundred one thousand, eight hundred twenty".