20485094369 has 2 divisors, whose sum is σ = 20485094370. Its totient is φ = 20485094368.

The previous prime is 20485094347. The next prime is 20485094419. The reversal of 20485094369 is 96349058402.

It is an a-pointer prime, because the next prime (20485094419) can be obtained adding 20485094369 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20481330769 + 3763600 = 143113^2 + 1940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20485094369 is a prime.

It is a super-2 number, since 2×20485094369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20485094339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242547184 + 10242547185.

It is an arithmetic number, because the mean of its divisors is an integer number (10242547185).

Almost surely, 2^20485094369 is an apocalyptic number.

It is an amenable number.

20485094369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485094369 is an equidigital number, since it uses as much as digits as its factorization.

20485094369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 20485094369 in words is "twenty billion, four hundred eighty-five million, ninety-four thousand, three hundred sixty-nine".