18113020 has 12 divisors (see below), whose sum is σ = 38037384. Its totient is φ = 7245200.

The previous prime is 18113009. The next prime is 18113027. The reversal of 18113020 is 2031181.

It is a junction number, because it is equal to n+sod(n) for n = 18112985 and 18113003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452806 + ... + 452845.

It is an arithmetic number, because the mean of its divisors is an integer number (3169782).

Almost surely, 2^18113020 is an apocalyptic number.

18113020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18113020 is an abundant number, since it is smaller than the sum of its proper divisors (19924364).

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

18113020 is a wasteful number, since it uses less digits than its factorization.

18113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905660 (or 905658 counting only the distinct ones).

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

The square root of 18113020 is about 4255.9393792675. The cubic root of 18113020 is about 262.6215068620.

The spelling of 18113020 in words is "eighteen million, one hundred thirteen thousand, twenty".