18123103272 has 16 divisors (see below), whose sum is σ = 45307758240. Its totient is φ = 6041034416.

The previous prime is 18123103199. The next prime is 18123103289. The reversal of 18123103272 is 27230132181.

It is an unprimeable number.

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, 377564628 + ... + 377564675.

It is an arithmetic number, because the mean of its divisors is an integer number (2831734890).

Almost surely, 2^18123103272 is an apocalyptic number.

18123103272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18123103272 is an abundant number, since it is smaller than the sum of its proper divisors (27184654968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18123103272 is a wasteful number, since it uses less digits than its factorization.

18123103272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755129312 (or 755129308 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 18123103272 in words is "eighteen billion, one hundred twenty-three million, one hundred three thousand, two hundred seventy-two".