20158208 has 54 divisors (see below), whose sum is σ = 46836216. Its totient is φ = 8633856.

The previous prime is 20158207. The next prime is 20158211. The reversal of 20158208 is 80285102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11741 + ... + 13347.

Almost surely, 2^20158208 is an apocalyptic number.

20158208 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 20158208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23418108).

20158208 is an abundant number, since it is smaller than the sum of its proper divisors (26678008).

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

20158208 is an equidigital number, since it uses as much as digits as its factorization.

20158208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 20158208 is about 4489.7893046333. The cubic root of 20158208 is about 272.1556202900.

The spelling of 20158208 in words is "twenty million, one hundred fifty-eight thousand, two hundred eight".