20102243 has 4 divisors (see below), whose sum is σ = 22974000. Its totient is φ = 17230488.

The previous prime is 20102239. The next prime is 20102263. The reversal of 20102243 is 34220102.

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

It is a cyclic number.

It is not a de Polignac number, because 20102243 - 2² = 20102239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435868 + ... + 1435881.

It is an arithmetic number, because the mean of its divisors is an integer number (5743500).

Almost surely, 2^20102243 is an apocalyptic number.

20102243 is a deficient number, since it is larger than the sum of its proper divisors (2871757).

20102243 is an equidigital number, since it uses as much as digits as its factorization.

20102243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871756.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20102243 is about 4483.5524977410. The cubic root of 20102243 is about 271.9035260155.

Adding to 20102243 its reverse (34220102), we get a palindrome (54322345).

The spelling of 20102243 in words is "twenty million, one hundred two thousand, two hundred forty-three".