20201868 has 36 divisors (see below), whose sum is σ = 51688728. Its totient is φ = 6651840.

The previous prime is 20201849. The next prime is 20201891. The reversal of 20201868 is 86810202.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (1435798).

Almost surely, 2^20201868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25844364).

20201868 is an abundant number, since it is smaller than the sum of its proper divisors (31486860).

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

20201868 is a wasteful number, since it uses less digits than its factorization.

20201868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6854 (or 6849 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20201868 is about 4494.6488183172. The cubic root of 20201868 is about 272.3519629111.

The spelling of 20201868 in words is "twenty million, two hundred one thousand, eight hundred sixty-eight".