1816782012 has 18 divisors (see below), whose sum is σ = 4592421288. Its totient is φ = 605593992.

The previous prime is 1816781999. The next prime is 1816782017. The reversal of 1816782012 is 2102876181.

1816782012 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50466167 = 1816782012 / (1 + 8 + 1 + 6 + 7 + 8 + 2 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816782017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25233048 + ... + 25233119.

It is an arithmetic number, because the mean of its divisors is an integer number (255134516).

Almost surely, 2^1816782012 is an apocalyptic number.

1816782012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1816782012 is an abundant number, since it is smaller than the sum of its proper divisors (2775639276).

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

1816782012 is a wasteful number, since it uses less digits than its factorization.

1816782012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50466177 (or 50466172 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1816782012 is about 42623.7259281729. The cubic root of 1816782012 is about 1220.2091399947.

The spelling of 1816782012 in words is "one billion, eight hundred sixteen million, seven hundred eighty-two thousand, twelve".