18123539038 has 16 divisors (see below), whose sum is σ = 30679346160. Its totient is φ = 7953904000.

The previous prime is 18123539029. The next prime is 18123539069. The reversal of 18123539038 is 83093532181.

It is a junction number, because it is equal to n+sod(n) for n = 18123538985 and 18123539003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14202763 + ... + 14204038.

It is an arithmetic number, because the mean of its divisors is an integer number (1917459135).

Almost surely, 2^18123539038 is an apocalyptic number.

18123539038 is a deficient number, since it is larger than the sum of its proper divisors (12555807122).

18123539038 is a wasteful number, since it uses less digits than its factorization.

18123539038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28406843.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 18123539038 in words is "eighteen billion, one hundred twenty-three million, five hundred thirty-nine thousand, thirty-eight".