1812995980 has 12 divisors (see below), whose sum is σ = 3807291600. Its totient is φ = 725198384.

The previous prime is 1812995969. The next prime is 1812996007. The reversal of 1812995980 is 895992181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45324880 + ... + 45324919.

It is an arithmetic number, because the mean of its divisors is an integer number (317274300).

Almost surely, 2^1812995980 is an apocalyptic number.

1812995980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1812995980 is an abundant number, since it is smaller than the sum of its proper divisors (1994295620).

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

1812995980 is a wasteful number, since it uses less digits than its factorization.

1812995980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90649808 (or 90649806 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 52.

The square root of 1812995980 is about 42579.2905060664. The cubic root of 1812995980 is about 1219.3609436403.

The spelling of 1812995980 in words is "one billion, eight hundred twelve million, nine hundred ninety-five thousand, nine hundred eighty".