20225820749 has 2 divisors, whose sum is σ = 20225820750. Its totient is φ = 20225820748.

The previous prime is 20225820683. The next prime is 20225820763. The reversal of 20225820749 is 94702852202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16407816649 + 3818004100 = 128093^2 + 61790^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225820749 - 2⁸ = 20225820493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225825749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112910374 + 10112910375.

It is an arithmetic number, because the mean of its divisors is an integer number (10112910375).

Almost surely, 2^20225820749 is an apocalyptic number.

It is an amenable number.

20225820749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225820749 is an equidigital number, since it uses as much as digits as its factorization.

20225820749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20225820749 in words is "twenty billion, two hundred twenty-five million, eight hundred twenty thousand, seven hundred forty-nine".