11720019169 has 2 divisors, whose sum is σ = 11720019170. Its totient is φ = 11720019168.

The previous prime is 11720019163. The next prime is 11720019191. The reversal of 11720019169 is 96191002711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11257210000 + 462809169 = 106100^2 + 21513^2 .

It is a cyclic number.

It is not a de Polignac number, because 11720019169 - 2⁷ = 11720019041 is a prime.

It is a super-2 number, since 2×11720019169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11720019163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860009584 + 5860009585.

It is an arithmetic number, because the mean of its divisors is an integer number (5860009585).

Almost surely, 2^11720019169 is an apocalyptic number.

It is an amenable number.

11720019169 is a deficient number, since it is larger than the sum of its proper divisors (1).

11720019169 is an equidigital number, since it uses as much as digits as its factorization.

11720019169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 37.

The spelling of 11720019169 in words is "eleven billion, seven hundred twenty million, nineteen thousand, one hundred sixty-nine".