20636168 has 64 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 8386560.

The previous prime is 20636159. The next prime is 20636183. The reversal of 20636168 is 86163602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157463 + ... + 157593.

It is an arithmetic number, because the mean of its divisors is an integer number (727650).

Almost surely, 2^20636168 is an apocalyptic number.

20636168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20636168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23284800).

20636168 is an abundant number, since it is smaller than the sum of its proper divisors (25933432).

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

20636168 is a wasteful number, since it uses less digits than its factorization.

20636168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20636168 is about 4542.7049210795. The cubic root of 20636168 is about 274.2898171303.

The spelling of 20636168 in words is "twenty million, six hundred thirty-six thousand, one hundred sixty-eight".