20755048169 has 2 divisors, whose sum is σ = 20755048170. Its totient is φ = 20755048168.

The previous prime is 20755048147. The next prime is 20755048207. The reversal of 20755048169 is 96184055702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20274342544 + 480705625 = 142388^2 + 21925^2 .

It is a cyclic number.

It is not a de Polignac number, because 20755048169 - 2³² = 16460080873 is a prime.

It is a super-2 number, since 2×20755048169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20755048129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10377524084 + 10377524085.

It is an arithmetic number, because the mean of its divisors is an integer number (10377524085).

Almost surely, 2^20755048169 is an apocalyptic number.

It is an amenable number.

20755048169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20755048169 is an equidigital number, since it uses as much as digits as its factorization.

20755048169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 20755048169 in words is "twenty billion, seven hundred fifty-five million, forty-eight thousand, one hundred sixty-nine".