20514443 has 2 divisors, whose sum is σ = 20514444. Its totient is φ = 20514442.

The previous prime is 20514421. The next prime is 20514449. The reversal of 20514443 is 34441502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20514443 - 2⁸ = 20514187 is a prime.

It is not a weakly prime, because it can be changed into another prime (20514449) 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 as a sum of consecutive naturals, namely, 10257221 + 10257222.

It is an arithmetic number, because the mean of its divisors is an integer number (10257222).

Almost surely, 2^20514443 is an apocalyptic number.

20514443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514443 is an equidigital number, since it uses as much as digits as its factorization.

20514443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20514443 is about 4529.2872507714. The cubic root of 20514443 is about 273.7494423930.

Adding to 20514443 its reverse (34441502), we get a palindrome (54955945).

The spelling of 20514443 in words is "twenty million, five hundred fourteen thousand, four hundred forty-three".