20130208 has 24 divisors (see below), whose sum is σ = 45293472. Its totient is φ = 8627136.

The previous prime is 20130203. The next prime is 20130223. The reversal of 20130208 is 80203102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20130191 and 20130200.

It is not an unprimeable number, because it can be changed into a prime (20130203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44710 + ... + 45157.

It is an arithmetic number, because the mean of its divisors is an integer number (1887228).

Almost surely, 2^20130208 is an apocalyptic number.

20130208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20130208 is an abundant number, since it is smaller than the sum of its proper divisors (25163264).

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

20130208 is an equidigital number, since it uses as much as digits as its factorization.

20130208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89884 (or 89876 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20130208 is about 4486.6700346694. The cubic root of 20130208 is about 272.0295527290.

The spelling of 20130208 in words is "twenty million, one hundred thirty thousand, two hundred eight".