23675231781 has 12 divisors (see below), whose sum is σ = 36209178252. Its totient is φ = 14855047296.

The previous prime is 23675231771. The next prime is 23675231813. The reversal of 23675231781 is 18713257632.

23675231781 is a `hidden beast` number, since 2 + 36 + 7 + 523 + 17 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17884782756 + 5790449025 = 133734^2 + 76095^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23675231781 is a prime.

It is a super-2 number, since 2×23675231781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23675231731) 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 in 11 ways as a sum of consecutive naturals, for example, 77369886 + ... + 77370191.

It is an arithmetic number, because the mean of its divisors is an integer number (3017431521).

Almost surely, 2^23675231781 is an apocalyptic number.

It is an amenable number.

23675231781 is a deficient number, since it is larger than the sum of its proper divisors (12533946471).

23675231781 is a wasteful number, since it uses less digits than its factorization.

23675231781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154740100 (or 154740097 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 23675231781 in words is "twenty-three billion, six hundred seventy-five million, two hundred thirty-one thousand, seven hundred eighty-one".