20545112369 has 2 divisors, whose sum is σ = 20545112370. Its totient is φ = 20545112368.

The previous prime is 20545112297. The next prime is 20545112383. The reversal of 20545112369 is 96321154502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12166090000 + 8379022369 = 110300^2 + 91537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20545112369 - 2¹⁶ = 20545046833 is a prime.

It is a super-2 number, since 2×20545112369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20545112569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272556184 + 10272556185.

It is an arithmetic number, because the mean of its divisors is an integer number (10272556185).

Almost surely, 2^20545112369 is an apocalyptic number.

It is an amenable number.

20545112369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545112369 is an equidigital number, since it uses as much as digits as its factorization.

20545112369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 20545112369 in words is "twenty billion, five hundred forty-five million, one hundred twelve thousand, three hundred sixty-nine".