20254393 has 2 divisors, whose sum is σ = 20254394. Its totient is φ = 20254392.

The previous prime is 20254391. The next prime is 20254397. The reversal of 20254393 is 39345202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19954089 + 300304 = 4467^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20254393 - 2¹ = 20254391 is a prime.

Together with 20254391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20254391) 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 as a sum of consecutive naturals, namely, 10127196 + 10127197.

It is an arithmetic number, because the mean of its divisors is an integer number (10127197).

Almost surely, 2^20254393 is an apocalyptic number.

It is an amenable number.

20254393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20254393 is an equidigital number, since it uses as much as digits as its factorization.

20254393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20254393 is about 4500.4880846415. The cubic root of 20254393 is about 272.5877976497.

Adding to 20254393 its reverse (39345202), we get a palindrome (59599595).

The spelling of 20254393 in words is "twenty million, two hundred fifty-four thousand, three hundred ninety-three".