1818131319 has 16 divisors (see below), whose sum is σ = 2695561440. Its totient is φ = 1211172480.

The previous prime is 1818131311. The next prime is 1818131333. The reversal of 1818131319 is 9131318181.

It is not a de Polignac number, because 1818131319 - 2³ = 1818131311 is a prime.

It is a super-2 number, since 2×1818131319² = 6611202986257359522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818131311) 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, 12009 + ... + 61485.

It is an arithmetic number, because the mean of its divisors is an integer number (168472590).

Almost surely, 2^1818131319 is an apocalyptic number.

1818131319 is a deficient number, since it is larger than the sum of its proper divisors (877430121).

1818131319 is a wasteful number, since it uses less digits than its factorization.

1818131319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50847 (or 50841 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 1818131319 is about 42639.5511116147. The cubic root of 1818131319 is about 1220.5111445451.

The spelling of 1818131319 in words is "one billion, eight hundred eighteen million, one hundred thirty-one thousand, three hundred nineteen".