20168508 has 12 divisors (see below), whose sum is σ = 47059880. Its totient is φ = 6722832.

The previous prime is 20168503. The next prime is 20168509. The reversal of 20168508 is 80586102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168503) 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, 840343 + ... + 840366.

Almost surely, 2^20168508 is an apocalyptic number.

It is an amenable number.

20168508 is an abundant number, since it is smaller than the sum of its proper divisors (26891372).

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

20168508 is a wasteful number, since it uses less digits than its factorization.

20168508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680716 (or 1680714 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 20168508 is about 4490.9362052917. The cubic root of 20168508 is about 272.2019657718.

The spelling of 20168508 in words is "twenty million, one hundred sixty-eight thousand, five hundred eight".