20187882 has 144 divisors (see below), whose sum is σ = 55770624. Its totient is φ = 5227200.

The previous prime is 20187833. The next prime is 20187887. The reversal of 20187882 is 28878102.

It is not an unprimeable number, because it can be changed into a prime (20187887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 651207 + ... + 651237.

It is an arithmetic number, because the mean of its divisors is an integer number (387296).

Almost surely, 2^20187882 is an apocalyptic number.

20187882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20187882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27885312).

20187882 is an abundant number, since it is smaller than the sum of its proper divisors (35582742).

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

20187882 is a wasteful number, since it uses less digits than its factorization.

20187882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 20187882 is about 4493.0926987989. The cubic root of 20187882 is about 272.2890975377.

The spelling of 20187882 in words is "twenty million, one hundred eighty-seven thousand, eight hundred eighty-two".