1818181818031 has 8 divisors (see below), whose sum is σ = 1843150780224. Its totient is φ = 1793214541440.

The previous prime is 1818181818017. The next prime is 1818181818073. The reversal of 1818181818031 is 1308181818181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1818181818031 - 2⁹ = 1818181817519 is a prime.

It is a super-2 number, since 2×1818181818031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818181818931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832955 + ... + 2645011.

It is an arithmetic number, because the mean of its divisors is an integer number (230393847528).

Almost surely, 2^{1818181818031} is an apocalyptic number.

1818181818031 is a deficient number, since it is larger than the sum of its proper divisors (24968962193).

1818181818031 is an equidigital number, since it uses as much as digits as its factorization.

1818181818031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842801.

The product of its (nonzero) digits is 98304, while the sum is 49.

The spelling of 1818181818031 in words is "one trillion, eight hundred eighteen billion, one hundred eighty-one million, eight hundred eighteen thousand, thirty-one".