18103120 has 40 divisors (see below), whose sum is σ = 48104064. Its totient is φ = 6206592.

The previous prime is 18103117. The next prime is 18103121. The reversal of 18103120 is 2130181.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 18103094 and 18103103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15604 + ... + 16723.

Almost surely, 2^18103120 is an apocalyptic number.

18103120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18103120 is an abundant number, since it is smaller than the sum of its proper divisors (30000944).

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

18103120 is a wasteful number, since it uses less digits than its factorization.

18103120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32347 (or 32341 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 18103120 is about 4254.7761398222. The cubic root of 18103120 is about 262.5736512909.

The spelling of 18103120 in words is "eighteen million, one hundred three thousand, one hundred twenty".