20254243 has 2 divisors, whose sum is σ = 20254244. Its totient is φ = 20254242.

The previous prime is 20254219. The next prime is 20254249. The reversal of 20254243 is 34245202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20254243 - 2¹⁷ = 20123171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20254249) 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, 10127121 + 10127122.

It is an arithmetic number, because the mean of its divisors is an integer number (10127122).

Almost surely, 2^20254243 is an apocalyptic number.

20254243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20254243 is an equidigital number, since it uses as much as digits as its factorization.

20254243 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 22.

The square root of 20254243 is about 4500.4714197515. The cubic root of 20254243 is about 272.5871247378.

Adding to 20254243 its reverse (34245202), we get a palindrome (54499445).

It can be divided in two parts, 202 and 54243, that added together give a palindrome (54445).

The spelling of 20254243 in words is "twenty million, two hundred fifty-four thousand, two hundred forty-three".