18648945097 has 4 divisors (see below), whose sum is σ = 18649576960. Its totient is φ = 18648313236.

The previous prime is 18648945047. The next prime is 18648945131. The reversal of 18648945097 is 79054984681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18648945097 - 2⁷ = 18648944969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18648945047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269373 + ... + 331450.

It is an arithmetic number, because the mean of its divisors is an integer number (4662394240).

Almost surely, 2^18648945097 is an apocalyptic number.

It is an amenable number.

18648945097 is a deficient number, since it is larger than the sum of its proper divisors (631863).

18648945097 is an equidigital number, since it uses as much as digits as its factorization.

18648945097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631862.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 18648945097 in words is "eighteen billion, six hundred forty-eight million, nine hundred forty-five thousand, ninety-seven".