1818473980 has 24 divisors (see below), whose sum is σ = 3819751488. Its totient is φ = 727207488.

The previous prime is 1818473977. The next prime is 1818474013. The reversal of 1818473980 is 893748181.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 94542 + ... + 112138.

It is an arithmetic number, because the mean of its divisors is an integer number (159156312).

Almost surely, 2^1818473980 is an apocalyptic number.

1818473980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818473980 is an abundant number, since it is smaller than the sum of its proper divisors (2001277508).

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

1818473980 is a wasteful number, since it uses less digits than its factorization.

1818473980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22773 (or 22771 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 1818473980 is about 42643.5690344980. The cubic root of 1818473980 is about 1220.5878158126.

The spelling of 1818473980 in words is "one billion, eight hundred eighteen million, four hundred seventy-three thousand, nine hundred eighty".