11730021791 has 2 divisors, whose sum is σ = 11730021792. Its totient is φ = 11730021790.

The previous prime is 11730021749. The next prime is 11730021859. The reversal of 11730021791 is 19712003711.

It is a weak prime.

It is an emirp because it is prime and its reverse (19712003711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11730021791 - 2¹⁰ = 11730020767 is a prime.

It is a super-2 number, since 2×11730021791² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11730027791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5865010895 + 5865010896.

It is an arithmetic number, because the mean of its divisors is an integer number (5865010896).

Almost surely, 2^11730021791 is an apocalyptic number.

11730021791 is a deficient number, since it is larger than the sum of its proper divisors (1).

11730021791 is an equidigital number, since it uses as much as digits as its factorization.

11730021791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 32.

The spelling of 11730021791 in words is "eleven billion, seven hundred thirty million, twenty-one thousand, seven hundred ninety-one".