20424222253 has 2 divisors, whose sum is σ = 20424222254. Its totient is φ = 20424222252.

The previous prime is 20424222241. The next prime is 20424222257. The reversal of 20424222253 is 35222242402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20254128489 + 170093764 = 142317^2 + 13042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424222253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424222257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212111126 + 10212111127.

It is an arithmetic number, because the mean of its divisors is an integer number (10212111127).

Almost surely, 2^20424222253 is an apocalyptic number.

It is an amenable number.

20424222253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424222253 is an equidigital number, since it uses as much as digits as its factorization.

20424222253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 20424222253 its reverse (35222242402), we get a palindrome (55646464655).

The spelling of 20424222253 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-two thousand, two hundred fifty-three".