18123820120 has 48 divisors (see below), whose sum is σ = 47436330240. Its totient is φ = 6213880512.

The previous prime is 18123820103. The next prime is 18123820153. The reversal of 18123820120 is 2102832181.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 4621464 + ... + 4625383.

It is an arithmetic number, because the mean of its divisors is an integer number (988256880).

Almost surely, 2^18123820120 is an apocalyptic number.

18123820120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18123820120 is an abundant number, since it is smaller than the sum of its proper divisors (29312510120).

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

18123820120 is a wasteful number, since it uses less digits than its factorization.

18123820120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9246872 (or 9246861 counting only the distinct ones).

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

The spelling of 18123820120 in words is "eighteen billion, one hundred twenty-three million, eight hundred twenty thousand, one hundred twenty".