2001818383819 has 4 divisors (see below), whose sum is σ = 2010795148096. Its totient is φ = 1992841619544.

The previous prime is 2001818383811. The next prime is 2001818383841. The reversal of 2001818383819 is 9183838181002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001818383819 - 2³ = 2001818383811 is a prime.

It is a super-2 number, since 2×2001818383819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001818383811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4488381804 + ... + 4488382249.

It is an arithmetic number, because the mean of its divisors is an integer number (502698787024).

Almost surely, 2^{2001818383819} is an apocalyptic number.

2001818383819 is a deficient number, since it is larger than the sum of its proper divisors (8976764277).

2001818383819 is an equidigital number, since it uses as much as digits as its factorization.

2001818383819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8976764276.

The product of its (nonzero) digits is 663552, while the sum is 52.

The spelling of 2001818383819 in words is "two trillion, one billion, eight hundred eighteen million, three hundred eighty-three thousand, eight hundred nineteen".