20018200 has 48 divisors (see below), whose sum is σ = 47050560. Its totient is φ = 7920000.

The previous prime is 20018171. The next prime is 20018227. The reversal of 20018200 is 281002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19705 + ... + 20695.

It is an arithmetic number, because the mean of its divisors is an integer number (980220).

Almost surely, 2^20018200 is an apocalyptic number.

20018200 is a gapful number since it is divisible by the number (20) 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 20018200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23525280).

20018200 is an abundant number, since it is smaller than the sum of its proper divisors (27032360).

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

20018200 is a wasteful number, since it uses less digits than its factorization.

20018200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20018200 is about 4474.1703141476. The cubic root of 20018200 is about 271.5240740308.

Adding to 20018200 its reverse (281002), we get a palindrome (20299202).

It can be divided in two parts, 2001 and 8200, that added together give a palindrome (10201).

The spelling of 20018200 in words is "twenty million, eighteen thousand, two hundred".