1818382020011 has 4 divisors (see below), whose sum is σ = 1818392394000. Its totient is φ = 1818371646024.

The previous prime is 1818382019989. The next prime is 1818382020071. The reversal of 1818382020011 is 1100202838181.

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 1818382020011 - 2²² = 1818377825707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818382020071) 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, 4919471 + ... + 5276168.

It is an arithmetic number, because the mean of its divisors is an integer number (454598098500).

Almost surely, 2^{1818382020011} is an apocalyptic number.

1818382020011 is a deficient number, since it is larger than the sum of its proper divisors (10373989).

1818382020011 is a wasteful number, since it uses less digits than its factorization.

1818382020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373988.

The product of its (nonzero) digits is 6144, while the sum is 35.

Adding to 1818382020011 its reverse (1100202838181), we get a palindrome (2918584858192).

The spelling of 1818382020011 in words is "one trillion, eight hundred eighteen billion, three hundred eighty-two million, twenty thousand, eleven".