2181836383 has 16 divisors (see below), whose sum is σ = 2256651936. Its totient is φ = 2108252160.

The previous prime is 2181836369. The next prime is 2181836407. The reversal of 2181836383 is 3836381812.

It is not a de Polignac number, because 2181836383 - 2⁵ = 2181836351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181836333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1792191 + ... + 1793407.

It is an arithmetic number, because the mean of its divisors is an integer number (141040746).

Almost surely, 2^2181836383 is an apocalyptic number.

2181836383 is a deficient number, since it is larger than the sum of its proper divisors (74815553).

2181836383 is a wasteful number, since it uses less digits than its factorization.

2181836383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its digits is 165888, while the sum is 43.

The square root of 2181836383 is about 46710.1314812964. The cubic root of 2181836383 is about 1297.0022410970.

The spelling of 2181836383 in words is "two billion, one hundred eighty-one million, eight hundred thirty-six thousand, three hundred eighty-three".