20082181 has 8 divisors (see below), whose sum is σ = 23742720. Its totient is φ = 16619568.

The previous prime is 20082163. The next prime is 20082191. The reversal of 20082181 is 18128002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20082181 - 2⁵ = 20082149 is a prime.

It is a super-2 number, since 2×20082181² = 806587987433522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20082191) 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 7 ways as a sum of consecutive naturals, for example, 49261 + ... + 49666.

It is an arithmetic number, because the mean of its divisors is an integer number (2967840).

Almost surely, 2^20082181 is an apocalyptic number.

It is an amenable number.

20082181 is a deficient number, since it is larger than the sum of its proper divisors (3660539).

20082181 is an equidigital number, since it uses as much as digits as its factorization.

20082181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98963.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 20082181 is about 4481.3146508586. The cubic root of 20082181 is about 271.8130428422.

The spelling of 20082181 in words is "twenty million, eighty-two thousand, one hundred eighty-one".