123842018 has 16 divisors (see below), whose sum is σ = 189818880. Its totient is φ = 60582816.

The previous prime is 123842009. The next prime is 123842041. The reversal of 123842018 is 810248321.

123842018 = 3207² + 3208² + ... + 3218².

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15203 + ... + 21881.

It is an arithmetic number, because the mean of its divisors is an integer number (11863680).

Almost surely, 2^123842018 is an apocalyptic number.

123842018 is a deficient number, since it is larger than the sum of its proper divisors (65976862).

123842018 is a wasteful number, since it uses less digits than its factorization.

123842018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6881.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 123842018 is about 11128.4328636156. The cubic root of 123842018 is about 498.4512315861.

The spelling of 123842018 in words is "one hundred twenty-three million, eight hundred forty-two thousand, eighteen".