11720858819 has 2 divisors, whose sum is σ = 11720858820. Its totient is φ = 11720858818.

The previous prime is 11720858813. The next prime is 11720858911. The reversal of 11720858819 is 91885802711.

It is a weak prime.

It is an emirp because it is prime and its reverse (91885802711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11720858819 - 2⁴ = 11720858803 is a prime.

It is a super-2 number, since 2×11720858819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11720858813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860429409 + 5860429410.

It is an arithmetic number, because the mean of its divisors is an integer number (5860429410).

Almost surely, 2^11720858819 is an apocalyptic number.

11720858819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11720858819 is an equidigital number, since it uses as much as digits as its factorization.

11720858819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 11720858819 in words is "eleven billion, seven hundred twenty million, eight hundred fifty-eight thousand, eight hundred nineteen".