20344143 has 4 divisors (see below), whose sum is σ = 27125528. Its totient is φ = 13562760.

The previous prime is 20344141. The next prime is 20344147. The reversal of 20344143 is 34144302.

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

It is not a de Polignac number, because 20344143 - 2¹ = 20344141 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 (20344141) 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, 3390688 + ... + 3390693.

It is an arithmetic number, because the mean of its divisors is an integer number (6781382).

Almost surely, 2^20344143 is an apocalyptic number.

20344143 is a deficient number, since it is larger than the sum of its proper divisors (6781385).

20344143 is an equidigital number, since it uses as much as digits as its factorization.

20344143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781384.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20344143 is about 4510.4482038928. The cubic root of 20344143 is about 272.9898290834.

Adding to 20344143 its reverse (34144302), we get a palindrome (54488445).

The spelling of 20344143 in words is "twenty million, three hundred forty-four thousand, one hundred forty-three".