20100208 has 20 divisors (see below), whose sum is σ = 39774240. Its totient is φ = 9835904.

The previous prime is 20100203. The next prime is 20100217. The reversal of 20100208 is 80200102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100203) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12613 + ... + 14116.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^20100208 is an apocalyptic number.

It is an amenable number.

20100208 is a deficient number, since it is larger than the sum of its proper divisors (19674032).

20100208 is a wasteful number, since it uses less digits than its factorization.

20100208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26784 (or 26778 counting only the distinct ones).

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

The square root of 20100208 is about 4483.3255514183. The cubic root of 20100208 is about 271.8943505494.

The spelling of 20100208 in words is "twenty million, one hundred thousand, two hundred eight".