23361847781 has 2 divisors, whose sum is σ = 23361847782. Its totient is φ = 23361847780.

The previous prime is 23361847633. The next prime is 23361847807. The reversal of 23361847781 is 18774816332.

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., 16277932225 + 7083915556 = 127585^2 + 84166^2 .

It is a cyclic number.

It is not a de Polignac number, because 23361847781 - 2²⁶ = 23294738917 is a prime.

It is a super-2 number, since 2×23361847781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23361847981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11680923890 + 11680923891.

It is an arithmetic number, because the mean of its divisors is an integer number (11680923891).

Almost surely, 2^23361847781 is an apocalyptic number.

It is an amenable number.

23361847781 is a deficient number, since it is larger than the sum of its proper divisors (1).

23361847781 is an equidigital number, since it uses as much as digits as its factorization.

23361847781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The spelling of 23361847781 in words is "twenty-three billion, three hundred sixty-one million, eight hundred forty-seven thousand, seven hundred eighty-one".