20881103 has 4 divisors (see below), whose sum is σ = 21235080. Its totient is φ = 20527128.

The previous prime is 20881097. The next prime is 20881109. The reversal of 20881103 is 30118802.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20881097) and next prime (20881109).

It is a cyclic number.

It is not a de Polignac number, because 20881103 - 2¹⁴ = 20864719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20881109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176900 + ... + 177017.

It is an arithmetic number, because the mean of its divisors is an integer number (5308770).

Almost surely, 2^20881103 is an apocalyptic number.

20881103 is a deficient number, since it is larger than the sum of its proper divisors (353977).

20881103 is an equidigital number, since it uses as much as digits as its factorization.

20881103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353976.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20881103 is about 4569.5845544207. The cubic root of 20881103 is about 275.3707528219.

Adding to 20881103 its reverse (30118802), we get a palindrome (50999905).

The spelling of 20881103 in words is "twenty million, eight hundred eighty-one thousand, one hundred three".