18196395473 has 4 divisors (see below), whose sum is σ = 18199771200. Its totient is φ = 18193019748.

The previous prime is 18196395461. The next prime is 18196395487. The reversal of 18196395473 is 37459369181.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37459369181 = 13 ⋅2881489937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18196395473 is a prime.

It is a super-2 number, since 2×18196395473² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18196395433) 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, 1679765 + ... + 1690562.

It is an arithmetic number, because the mean of its divisors is an integer number (4549942800).

Almost surely, 2^18196395473 is an apocalyptic number.

It is an amenable number.

18196395473 is a deficient number, since it is larger than the sum of its proper divisors (3375727).

18196395473 is an equidigital number, since it uses as much as digits as its factorization.

18196395473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375726.

The product of its digits is 4898880, while the sum is 56.

The spelling of 18196395473 in words is "eighteen billion, one hundred ninety-six million, three hundred ninety-five thousand, four hundred seventy-three".