18810372097 has 4 divisors (see below), whose sum is σ = 20520405936. Its totient is φ = 17100338260.

The previous prime is 18810372079. The next prime is 18810372121. The reversal of 18810372097 is 79027301881.

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 18810372097 - 2⁷ = 18810371969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18810372067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855016903 + ... + 855016924.

It is an arithmetic number, because the mean of its divisors is an integer number (5130101484).

Almost surely, 2^18810372097 is an apocalyptic number.

It is an amenable number.

18810372097 is a deficient number, since it is larger than the sum of its proper divisors (1710033839).

18810372097 is a wasteful number, since it uses less digits than its factorization.

18810372097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710033838.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 18810372097 in words is "eighteen billion, eight hundred ten million, three hundred seventy-two thousand, ninety-seven".