20425363169 has 2 divisors, whose sum is σ = 20425363170. Its totient is φ = 20425363168.

The previous prime is 20425363139. The next prime is 20425363237. The reversal of 20425363169 is 96136352402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14463670225 + 5961692944 = 120265^2 + 77212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20425363169 is a prime.

It is a super-2 number, since 2×20425363169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20425363129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212681584 + 10212681585.

It is an arithmetic number, because the mean of its divisors is an integer number (10212681585).

Almost surely, 2^20425363169 is an apocalyptic number.

It is an amenable number.

20425363169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425363169 is an equidigital number, since it uses as much as digits as its factorization.

20425363169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 20425363169 in words is "twenty billion, four hundred twenty-five million, three hundred sixty-three thousand, one hundred sixty-nine".