18102123 has 20 divisors (see below), whose sum is σ = 29123248. Its totient is φ = 11139120.

The previous prime is 18102121. The next prime is 18102131. The reversal of 18102123 is 32120181.

It is not a de Polignac number, because 18102123 - 2¹ = 18102121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18102096 and 18102105.

It is not an unprimeable number, because it can be changed into a prime (18102121) 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 19 ways as a sum of consecutive naturals, for example, 7543 + ... + 9648.

Almost surely, 2^18102123 is an apocalyptic number.

18102123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18102123 is a deficient number, since it is larger than the sum of its proper divisors (11021125).

18102123 is a wasteful number, since it uses less digits than its factorization.

18102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17216 (or 17207 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18102123 is about 4254.6589757582. The cubic root of 18102123 is about 262.5688309296.

It can be divided in two parts, 18102 and 123, that added together give a square (18225 = 135²).

The spelling of 18102123 in words is "eighteen million, one hundred two thousand, one hundred twenty-three".