18118620 has 192 divisors, whose sum is σ = 63504000. Its totient is φ = 4257792.

The previous prime is 18118603. The next prime is 18118657. The reversal of 18118620 is 2681181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203536 + ... + 203624.

It is an arithmetic number, because the mean of its divisors is an integer number (330750).

Almost surely, 2^18118620 is an apocalyptic number.

18118620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18118620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

18118620 is an abundant number, since it is smaller than the sum of its proper divisors (45385380).

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

18118620 is a wasteful number, since it uses less digits than its factorization.

18118620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18118620 is about 4256.5972325321. The cubic root of 18118620 is about 262.6485689587.

The spelling of 18118620 in words is "eighteen million, one hundred eighteen thousand, six hundred twenty".