18500935097 has 2 divisors, whose sum is σ = 18500935098. Its totient is φ = 18500935096.

The previous prime is 18500935081. The next prime is 18500935157. The reversal of 18500935097 is 79053900581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17933495056 + 567440041 = 133916^2 + 23821^2 .

It is a cyclic number.

It is not a de Polignac number, because 18500935097 - 2⁴ = 18500935081 is a prime.

It is not a weakly prime, because it can be changed into another prime (18500937097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250467548 + 9250467549.

It is an arithmetic number, because the mean of its divisors is an integer number (9250467549).

Almost surely, 2^18500935097 is an apocalyptic number.

It is an amenable number.

18500935097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18500935097 is an equidigital number, since it uses as much as digits as its factorization.

18500935097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 47.

The spelling of 18500935097 in words is "eighteen billion, five hundred million, nine hundred thirty-five thousand, ninety-seven".