1816843364 has 18 divisors (see below), whose sum is σ = 3698574390. Its totient is φ = 778647072.

The previous prime is 1816843361. The next prime is 1816843453. The reversal of 1816843364 is 4633486181.

It can be written as a sum of positive squares in only one way, i.e., 972940864 + 843902500 = 31192^2 + 29050^2 .

It is not an unprimeable number, because it can be changed into a prime (1816843361) 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, 4634609 + ... + 4635000.

It is an arithmetic number, because the mean of its divisors is an integer number (205476355).

Almost surely, 2^1816843364 is an apocalyptic number.

1816843364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1816843364 is an abundant number, since it is smaller than the sum of its proper divisors (1881731026).

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

1816843364 is a wasteful number, since it uses less digits than its factorization.

1816843364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269627 (or 9269618 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 1816843364 is about 42624.4456151631. The cubic root of 1816843364 is about 1220.2228751645. Note that the first 3 decimals are identical.

The spelling of 1816843364 in words is "one billion, eight hundred sixteen million, eight hundred forty-three thousand, three hundred sixty-four".