123418018 has 4 divisors (see below), whose sum is σ = 185127030. Its totient is φ = 61709008.

The previous prime is 123418013. The next prime is 123418019. The reversal of 123418018 is 810814321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810814321 = 43 ⋅18856147.

It can be written as a sum of positive squares in only one way, i.e., 116273089 + 7144929 = 10783^2 + 2673^2 .

It is not an unprimeable number, because it can be changed into a prime (123418013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30854503 + ... + 30854506.

Almost surely, 2^123418018 is an apocalyptic number.

123418018 is a deficient number, since it is larger than the sum of its proper divisors (61709012).

123418018 is an equidigital number, since it uses as much as digits as its factorization.

123418018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61709011.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 123418018 is about 11109.3662285479. The cubic root of 123418018 is about 497.8817291974.

The spelling of 123418018 in words is "one hundred twenty-three million, four hundred eighteen thousand, eighteen".