18497140923 has 4 divisors (see below), whose sum is σ = 24662854568. Its totient is φ = 12331427280.

The previous prime is 18497140913. The next prime is 18497140951. The reversal of 18497140923 is 32904179481.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18497140923 - 2²⁰ = 18496092347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18497140913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082856818 + ... + 3082856823.

It is an arithmetic number, because the mean of its divisors is an integer number (6165713642).

Almost surely, 2^18497140923 is an apocalyptic number.

18497140923 is a deficient number, since it is larger than the sum of its proper divisors (6165713645).

18497140923 is an equidigital number, since it uses as much as digits as its factorization.

18497140923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165713644.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 18497140923 in words is "eighteen billion, four hundred ninety-seven million, one hundred forty thousand, nine hundred twenty-three".