20201880 has 64 divisors (see below), whose sum is σ = 61401600. Its totient is φ = 5316480.

The previous prime is 20201849. The next prime is 20201891. The reversal of 20201880 is 8810202.

It is a congruent number.

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, 8415 + ... + 10545.

It is an arithmetic number, because the mean of its divisors is an integer number (959400).

Almost surely, 2^20201880 is an apocalyptic number.

20201880 is a gapful number since it is divisible by the number (20) 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 20201880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30700800).

20201880 is an abundant number, since it is smaller than the sum of its proper divisors (41199720).

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

20201880 is a wasteful number, since it uses less digits than its factorization.

20201880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 20201880 is about 4494.6501532377. The cubic root of 20201880 is about 272.3520168372.

The spelling of 20201880 in words is "twenty million, two hundred one thousand, eight hundred eighty".