1818131416 has 16 divisors (see below), whose sum is σ = 3557214000. Its totient is φ = 869541024.

The previous prime is 1818131411. The next prime is 1818131417. The reversal of 1818131416 is 6141318181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818131411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940391 + ... + 4940758.

It is an arithmetic number, because the mean of its divisors is an integer number (222325875).

Almost surely, 2^1818131416 is an apocalyptic number.

It is an amenable number.

1818131416 is a deficient number, since it is larger than the sum of its proper divisors (1739082584).

1818131416 is a wasteful number, since it uses less digits than its factorization.

1818131416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881178 (or 9881174 counting only the distinct ones).

The product of its digits is 4608, while the sum is 34.

The square root of 1818131416 is about 42639.5522490563. The cubic root of 1818131416 is about 1220.5111662505.

Adding to 1818131416 its reverse (6141318181), we get a palindrome (7959449597).

The spelling of 1818131416 in words is "one billion, eight hundred eighteen million, one hundred thirty-one thousand, four hundred sixteen".