20130808 has 8 divisors (see below), whose sum is σ = 37745280. Its totient is φ = 10065400.

The previous prime is 20130797. The next prime is 20130829. The reversal of 20130808 is 80803102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258168 + ... + 1258183.

It is an arithmetic number, because the mean of its divisors is an integer number (4718160).

Almost surely, 2^20130808 is an apocalyptic number.

It is an amenable number.

20130808 is a deficient number, since it is larger than the sum of its proper divisors (17614472).

20130808 is a wasteful number, since it uses less digits than its factorization.

20130808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516357 (or 2516353 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20130808 is about 4486.7368989055. The cubic root of 20130808 is about 272.0322554020.

The spelling of 20130808 in words is "twenty million, one hundred thirty thousand, eight hundred eight".