20117608 has 16 divisors (see below), whose sum is σ = 43109280. Its totient is φ = 8621808.

The previous prime is 20117567. The next prime is 20117611. The reversal of 20117608 is 80671102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179566 + ... + 179677.

It is an arithmetic number, because the mean of its divisors is an integer number (2694330).

Almost surely, 2^20117608 is an apocalyptic number.

20117608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20117608 is an abundant number, since it is smaller than the sum of its proper divisors (22991672).

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

20117608 is a wasteful number, since it uses less digits than its factorization.

20117608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359256 (or 359252 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20117608 is about 4485.2656554545. The cubic root of 20117608 is about 271.9727841858.

The spelling of 20117608 in words is "twenty million, one hundred seventeen thousand, six hundred eight".