2001838381819 has 4 divisors (see below), whose sum is σ = 2001999715720. Its totient is φ = 2001677047920.

The previous prime is 2001838381817. The next prime is 2001838381831. The reversal of 2001838381819 is 9181838381002.

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 2001838381819 - 2¹ = 2001838381817 is a prime.

It is a super-2 number, since 2×2001838381819² (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 (2001838381817) 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, 80648337 + ... + 80673154.

It is an arithmetic number, because the mean of its divisors is an integer number (500499928930).

Almost surely, 2^{2001838381819} is an apocalyptic number.

2001838381819 is a deficient number, since it is larger than the sum of its proper divisors (161333901).

2001838381819 is a wasteful number, since it uses less digits than its factorization.

2001838381819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161333900.

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

The spelling of 2001838381819 in words is "two trillion, one billion, eight hundred thirty-eight million, three hundred eighty-one thousand, eight hundred nineteen".