18472343537 has 2 divisors, whose sum is σ = 18472343538. Its totient is φ = 18472343536.

The previous prime is 18472343521. The next prime is 18472343587. The reversal of 18472343537 is 73534327481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12306796096 + 6165547441 = 110936^2 + 78521^2 .

It is a cyclic number.

It is not a de Polignac number, because 18472343537 - 2⁴ = 18472343521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18472343491 and 18472343500.

It is not a weakly prime, because it can be changed into another prime (18472343587) 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, 9236171768 + 9236171769.

It is an arithmetic number, because the mean of its divisors is an integer number (9236171769).

Almost surely, 2^18472343537 is an apocalyptic number.

It is an amenable number.

18472343537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18472343537 is an equidigital number, since it uses as much as digits as its factorization.

18472343537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 47.

The spelling of 18472343537 in words is "eighteen billion, four hundred seventy-two million, three hundred forty-three thousand, five hundred thirty-seven".