20103188 has 48 divisors (see below), whose sum is σ = 41986560. Its totient is φ = 8243424.

The previous prime is 20103157. The next prime is 20103191. The reversal of 20103188 is 88130102.

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, 70895 + ... + 71177.

It is an arithmetic number, because the mean of its divisors is an integer number (874720).

Almost surely, 2^20103188 is an apocalyptic number.

20103188 is a gapful number since it is divisible by the number (28) 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 20103188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20993280).

20103188 is an abundant number, since it is smaller than the sum of its proper divisors (21883372).

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

20103188 is a wasteful number, since it uses less digits than its factorization.

20103188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20103188 is about 4483.6578816854. The cubic root of 20103188 is about 271.9077866480.

The spelling of 20103188 in words is "twenty million, one hundred three thousand, one hundred eighty-eight".