20117208 has 32 divisors (see below), whose sum is σ = 50904000. Its totient is φ = 6624288.

The previous prime is 20117179. The next prime is 20117231. The reversal of 20117208 is 80271102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (1590750).

Almost surely, 2^20117208 is an apocalyptic number.

It is an amenable number.

20117208 is an abundant number, since it is smaller than the sum of its proper divisors (30786792).

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

20117208 is a wasteful number, since it uses less digits than its factorization.

20117208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 20117208 is about 4485.2210647860. The cubic root of 20117208 is about 271.9709816217.

The spelling of 20117208 in words is "twenty million, one hundred seventeen thousand, two hundred eight".