23703769781 has 2 divisors, whose sum is σ = 23703769782. Its totient is φ = 23703769780.

The previous prime is 23703769777. The next prime is 23703769841. The reversal of 23703769781 is 18796730732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17230762756 + 6473007025 = 131266^2 + 80455^2 .

It is a cyclic number.

It is not a de Polignac number, because 23703769781 - 2² = 23703769777 is a prime.

It is a super-2 number, since 2×23703769781² (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 (23703769741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11851884890 + 11851884891.

It is an arithmetic number, because the mean of its divisors is an integer number (11851884891).

Almost surely, 2^23703769781 is an apocalyptic number.

It is an amenable number.

23703769781 is a deficient number, since it is larger than the sum of its proper divisors (1).

23703769781 is an equidigital number, since it uses as much as digits as its factorization.

23703769781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 23703769781 in words is "twenty-three billion, seven hundred three million, seven hundred sixty-nine thousand, seven hundred eighty-one".