18197774346 has 32 divisors (see below), whose sum is σ = 36902476800. Its totient is φ = 5981629680.

The previous prime is 18197774341. The next prime is 18197774347. The reversal of 18197774346 is 64347779181.

It is a super-2 number, since 2×18197774346² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18197774341) 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 15 ways as a sum of consecutive naturals, for example, 360745 + ... + 408083.

It is an arithmetic number, because the mean of its divisors is an integer number (1153202400).

Almost surely, 2^18197774346 is an apocalyptic number.

18197774346 is an abundant number, since it is smaller than the sum of its proper divisors (18704702454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18197774346 is a wasteful number, since it uses less digits than its factorization.

18197774346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48234.

The product of its digits is 7112448, while the sum is 57.

The spelling of 18197774346 in words is "eighteen billion, one hundred ninety-seven million, seven hundred seventy-four thousand, three hundred forty-six".