18475417537 has 2 divisors, whose sum is σ = 18475417538. Its totient is φ = 18475417536.

The previous prime is 18475417531. The next prime is 18475417549. The reversal of 18475417537 is 73571457481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13860117441 + 4615300096 = 117729^2 + 67936^2 .

It is a cyclic number.

It is not a de Polignac number, because 18475417537 - 2⁷ = 18475417409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18475417531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237708768 + 9237708769.

It is an arithmetic number, because the mean of its divisors is an integer number (9237708769).

Almost surely, 2^18475417537 is an apocalyptic number.

It is an amenable number.

18475417537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18475417537 is an equidigital number, since it uses as much as digits as its factorization.

18475417537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3292800, while the sum is 52.

The spelling of 18475417537 in words is "eighteen billion, four hundred seventy-five million, four hundred seventeen thousand, five hundred thirty-seven".