20115465562169 has 2 divisors, whose sum is σ = 20115465562170. Its totient is φ = 20115465562168.

The previous prime is 20115465562117. The next prime is 20115465562217. The reversal of 20115465562169 is 96126556451102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14031167472400 + 6084298089769 = 3745820^2 + 2466637^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115465562169 - 2³⁶ = 20046746085433 is a prime.

It is a super-2 number, since 2×20115465562169² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115465562169.

It is not a weakly prime, because it can be changed into another prime (20115465562069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057732781084 + 10057732781085.

It is an arithmetic number, because the mean of its divisors is an integer number (10057732781085).

Almost surely, 2^{20115465562169} is an apocalyptic number.

It is an amenable number.

20115465562169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115465562169 is an equidigital number, since it uses as much as digits as its factorization.

20115465562169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 20115465562169 in words is "twenty trillion, one hundred fifteen billion, four hundred sixty-five million, five hundred sixty-two thousand, one hundred sixty-nine".