1812381936 has 20 divisors (see below), whose sum is σ = 4681986792. Its totient is φ = 604127296.

The previous prime is 1812381889. The next prime is 1812382003. The reversal of 1812381936 is 6391832181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18878931 + ... + 18879026.

Almost surely, 2^1812381936 is an apocalyptic number.

1812381936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1812381936 is an abundant number, since it is smaller than the sum of its proper divisors (2869604856).

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

1812381936 is a wasteful number, since it uses less digits than its factorization.

1812381936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37757968 (or 37757962 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 1812381936 is about 42572.0793008751. The cubic root of 1812381936 is about 1219.2232662220.

The spelling of 1812381936 in words is "one billion, eight hundred twelve million, three hundred eighty-one thousand, nine hundred thirty-six".