23231686178 has 4 divisors (see below), whose sum is σ = 34847529270. Its totient is φ = 11615843088.

The previous prime is 23231686157. The next prime is 23231686211. The reversal of 23231686178 is 87168613232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12222850249 + 11008835929 = 110557^2 + 104923^2 .

It is a super-2 number, since 2×23231686178² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 5807921543 + ... + 5807921546.

Almost surely, 2^23231686178 is an apocalyptic number.

23231686178 is a deficient number, since it is larger than the sum of its proper divisors (11615843092).

23231686178 is a wasteful number, since it uses less digits than its factorization.

23231686178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11615843091.

The product of its digits is 580608, while the sum is 47.

The spelling of 23231686178 in words is "twenty-three billion, two hundred thirty-one million, six hundred eighty-six thousand, one hundred seventy-eight".