20225242357 has 2 divisors, whose sum is σ = 20225242358. Its totient is φ = 20225242356.

The previous prime is 20225242333. The next prime is 20225242409. The reversal of 20225242357 is 75324252202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19321278001 + 903964356 = 139001^2 + 30066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20225242357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225242307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112621178 + 10112621179.

It is an arithmetic number, because the mean of its divisors is an integer number (10112621179).

Almost surely, 2^20225242357 is an apocalyptic number.

It is an amenable number.

20225242357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225242357 is an equidigital number, since it uses as much as digits as its factorization.

20225242357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 34.

Adding to 20225242357 its reverse (75324252202), we get a palindrome (95549494559).

The spelling of 20225242357 in words is "twenty billion, two hundred twenty-five million, two hundred forty-two thousand, three hundred fifty-seven".