999823142918 has 8 divisors (see below), whose sum is σ = 1587954403512. Its totient is φ = 470505008416.

The previous prime is 999823142917. The next prime is 999823142951. The reversal of 999823142918 is 819241328999.

It is a happy number.

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

It is a super-2 number, since 2×999823142918² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999823142917) 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, 14703281480 + ... + 14703281547.

It is an arithmetic number, because the mean of its divisors is an integer number (198494300439).

Almost surely, 2^999823142918 is an apocalyptic number.

999823142918 is a deficient number, since it is larger than the sum of its proper divisors (588131260594).

999823142918 is a wasteful number, since it uses less digits than its factorization.

999823142918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29406563046.

The product of its digits is 20155392, while the sum is 65.

The spelling of 999823142918 in words is "nine hundred ninety-nine billion, eight hundred twenty-three million, one hundred forty-two thousand, nine hundred eighteen".