18409305097 has 2 divisors, whose sum is σ = 18409305098. Its totient is φ = 18409305096.

The previous prime is 18409305073. The next prime is 18409305137. The reversal of 18409305097 is 79050390481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18236881936 + 172423161 = 135044^2 + 13131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18409305097 is a prime.

It is not a weakly prime, because it can be changed into another prime (18409305007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9204652548 + 9204652549.

It is an arithmetic number, because the mean of its divisors is an integer number (9204652549).

Almost surely, 2^18409305097 is an apocalyptic number.

It is an amenable number.

18409305097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18409305097 is an equidigital number, since it uses as much as digits as its factorization.

18409305097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 18409305097 in words is "eighteen billion, four hundred nine million, three hundred five thousand, ninety-seven".