20144323 has 4 divisors (see below), whose sum is σ = 20162808. Its totient is φ = 20125840.

The previous prime is 20144321. The next prime is 20144347. The reversal of 20144323 is 32344102.

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 20144323 - 2¹ = 20144321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20144323.

It is not an unprimeable number, because it can be changed into a prime (20144321) 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 3 ways as a sum of consecutive naturals, for example, 7498 + ... + 9823.

It is an arithmetic number, because the mean of its divisors is an integer number (5040702).

Almost surely, 2^20144323 is an apocalyptic number.

20144323 is a deficient number, since it is larger than the sum of its proper divisors (18485).

20144323 is a wasteful number, since it uses less digits than its factorization.

20144323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20144323 is about 4488.2427519019. The cubic root of 20144323 is about 272.0931188886.

Adding to 20144323 its reverse (32344102), we get a palindrome (52488425).

The spelling of 20144323 in words is "twenty million, one hundred forty-four thousand, three hundred twenty-three".