20443103 has 4 divisors (see below), whose sum is σ = 20918568. Its totient is φ = 19967640.

The previous prime is 20443097. The next prime is 20443109. The reversal of 20443103 is 30134402.

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 (20443097) and next prime (20443109).

It is a cyclic number.

It is not a de Polignac number, because 20443103 - 2⁶ = 20443039 is a prime.

It is a super-4 number, since 4×20443103⁴ (a number of 30 digits) contains 4444 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 (20443109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237668 + ... + 237753.

It is an arithmetic number, because the mean of its divisors is an integer number (5229642).

Almost surely, 2^20443103 is an apocalyptic number.

20443103 is a deficient number, since it is larger than the sum of its proper divisors (475465).

20443103 is an equidigital number, since it uses as much as digits as its factorization.

20443103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475464.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20443103 is about 4521.4049807554. The cubic root of 20443103 is about 273.4317480564.

Adding to 20443103 its reverse (30134402), we get a palindrome (50577505).

The spelling of 20443103 in words is "twenty million, four hundred forty-three thousand, one hundred three".