20252250869 has 2 divisors, whose sum is σ = 20252250870. Its totient is φ = 20252250868.

The previous prime is 20252250839. The next prime is 20252250871. The reversal of 20252250869 is 96805225202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17014071844 + 3238179025 = 130438^2 + 56905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20252250869 is a prime.

It is a super-2 number, since 2×20252250869² (a number of 21 digits) contains 22 as substring.

Together with 20252250871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20252250829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126125434 + 10126125435.

It is an arithmetic number, because the mean of its divisors is an integer number (10126125435).

Almost surely, 2^20252250869 is an apocalyptic number.

It is an amenable number.

20252250869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20252250869 is an equidigital number, since it uses as much as digits as its factorization.

20252250869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 20252250869 in words is "twenty billion, two hundred fifty-two million, two hundred fifty thousand, eight hundred sixty-nine".