20256208 has 40 divisors (see below), whose sum is σ = 45780800. Its totient is φ = 8678880.

The previous prime is 20256161. The next prime is 20256217. The reversal of 20256208 is 80265202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3643 + ... + 7333.

It is an arithmetic number, because the mean of its divisors is an integer number (1144520).

Almost surely, 2^20256208 is an apocalyptic number.

20256208 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 20256208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22890400).

20256208 is an abundant number, since it is smaller than the sum of its proper divisors (25524592).

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

20256208 is an equidigital number, since it uses as much as digits as its factorization.

20256208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20256208 is about 4500.6897249199. The cubic root of 20256208 is about 272.5959396213.

The spelling of 20256208 in words is "twenty million, two hundred fifty-six thousand, two hundred eight".