23171780039 has 2 divisors, whose sum is σ = 23171780040. Its totient is φ = 23171780038.

The previous prime is 23171779999. The next prime is 23171780081. The reversal of 23171780039 is 93008717132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23171780039 - 2¹² = 23171775943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23171779978 and 23171780005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23171780939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11585890019 + 11585890020.

It is an arithmetic number, because the mean of its divisors is an integer number (11585890020).

Almost surely, 2^23171780039 is an apocalyptic number.

23171780039 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171780039 is an equidigital number, since it uses as much as digits as its factorization.

23171780039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 23171780039 in words is "twenty-three billion, one hundred seventy-one million, seven hundred eighty thousand, thirty-nine".