18072517937 has 2 divisors, whose sum is σ = 18072517938. Its totient is φ = 18072517936.

The previous prime is 18072517933. The next prime is 18072517963. The reversal of 18072517937 is 73971527081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16494521761 + 1577996176 = 128431^2 + 39724^2 .

It is a cyclic number.

It is not a de Polignac number, because 18072517937 - 2² = 18072517933 is a prime.

It is not a weakly prime, because it can be changed into another prime (18072517933) 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 as a sum of consecutive naturals, namely, 9036258968 + 9036258969.

It is an arithmetic number, because the mean of its divisors is an integer number (9036258969).

Almost surely, 2^18072517937 is an apocalyptic number.

It is an amenable number.

18072517937 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072517937 is an equidigital number, since it uses as much as digits as its factorization.

18072517937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 50.

The spelling of 18072517937 in words is "eighteen billion, seventy-two million, five hundred seventeen thousand, nine hundred thirty-seven".