18119123 has 4 divisors (see below), whose sum is σ = 19766328. Its totient is φ = 16471920.

The previous prime is 18119117. The next prime is 18119177. The reversal of 18119123 is 32191181.

18119123 = 897² + 898² + ... + 918².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18119123 - 2⁴ = 18119107 is a prime.

It is a super-3 number, since 3×18119123³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18119092 and 18119101.

It is not an unprimeable number, because it can be changed into a prime (18119183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823586 + ... + 823607.

It is an arithmetic number, because the mean of its divisors is an integer number (4941582).

Almost surely, 2^18119123 is an apocalyptic number.

18119123 is a deficient number, since it is larger than the sum of its proper divisors (1647205).

18119123 is a wasteful number, since it uses less digits than its factorization.

18119123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647204.

The product of its digits is 432, while the sum is 26.

The square root of 18119123 is about 4256.6563168760. The cubic root of 18119123 is about 262.6509994420.

The spelling of 18119123 in words is "eighteen million, one hundred nineteen thousand, one hundred twenty-three".