18620500 has 48 divisors (see below), whose sum is σ = 41094144. Its totient is φ = 7370400.

The previous prime is 18620489. The next prime is 18620521. The reversal of 18620500 is 502681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83389 + ... + 83611.

It is an arithmetic number, because the mean of its divisors is an integer number (856128).

Almost surely, 2^18620500 is an apocalyptic number.

18620500 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 18620500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20547072).

18620500 is an abundant number, since it is smaller than the sum of its proper divisors (22473644).

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

18620500 is a wasteful number, since it uses less digits than its factorization.

18620500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18620500 is about 4315.1477379112. The cubic root of 18620500 is about 265.0516097417.

The spelling of 18620500 in words is "eighteen million, six hundred twenty thousand, five hundred".