1818996858 has 64 divisors (see below), whose sum is σ = 4768727040. Its totient is φ = 502945200.

The previous prime is 1818996853. The next prime is 1818996871. The reversal of 1818996858 is 8586998181.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1818996795 and 1818996804.

It is not an unprimeable number, because it can be changed into a prime (1818996853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65898 + ... + 89333.

It is an arithmetic number, because the mean of its divisors is an integer number (74511360).

Almost surely, 2^1818996858 is an apocalyptic number.

1818996858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1818996858 is an abundant number, since it is smaller than the sum of its proper divisors (2949730182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818996858 is a wasteful number, since it uses less digits than its factorization.

1818996858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155280 (or 155274 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 63.

The square root of 1818996858 is about 42649.6993893275. The cubic root of 1818996858 is about 1220.7047925309.

The spelling of 1818996858 in words is "one billion, eight hundred eighteen million, nine hundred ninety-six thousand, eight hundred fifty-eight".