23671779181 has 2 divisors, whose sum is σ = 23671779182. Its totient is φ = 23671779180.

The previous prime is 23671779169. The next prime is 23671779293. The reversal of 23671779181 is 18197717632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20652276681 + 3019502500 = 143709^2 + 54950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23671779181 is a prime.

It is a super-2 number, since 2×23671779181² (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 (23671779161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11835889590 + 11835889591.

It is an arithmetic number, because the mean of its divisors is an integer number (11835889591).

Almost surely, 2^23671779181 is an apocalyptic number.

It is an amenable number.

23671779181 is a deficient number, since it is larger than the sum of its proper divisors (1).

23671779181 is an equidigital number, since it uses as much as digits as its factorization.

23671779181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The spelling of 23671779181 in words is "twenty-three billion, six hundred seventy-one million, seven hundred seventy-nine thousand, one hundred eighty-one".