20514423 has 4 divisors (see below), whose sum is σ = 27352568. Its totient is φ = 13676280.

The previous prime is 20514421. The next prime is 20514443. The reversal of 20514423 is 32441502.

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

It is not a de Polignac number, because 20514423 - 2¹ = 20514421 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 20514423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20514421) 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, 3419068 + ... + 3419073.

It is an arithmetic number, because the mean of its divisors is an integer number (6838142).

Almost surely, 2^20514423 is an apocalyptic number.

20514423 is a deficient number, since it is larger than the sum of its proper divisors (6838145).

20514423 is an equidigital number, since it uses as much as digits as its factorization.

20514423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838144.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20514423 is about 4529.2850429179. The cubic root of 20514423 is about 273.7493534315.

Adding to 20514423 its reverse (32441502), we get a palindrome (52955925).

The spelling of 20514423 in words is "twenty million, five hundred fourteen thousand, four hundred twenty-three".