18194486546 has 4 divisors (see below), whose sum is σ = 27291729822. Its totient is φ = 9097243272.

The previous prime is 18194486533. The next prime is 18194486573. The reversal of 18194486546 is 64568449181.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 9694568521 + 8499918025 = 98461^2 + 92195^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18194486491 and 18194486500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4548621635 + ... + 4548621638.

Almost surely, 2^18194486546 is an apocalyptic number.

18194486546 is a deficient number, since it is larger than the sum of its proper divisors (9097243276).

18194486546 is an equidigital number, since it uses as much as digits as its factorization.

18194486546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9097243275.

The product of its digits is 6635520, while the sum is 56.

The spelling of 18194486546 in words is "eighteen billion, one hundred ninety-four million, four hundred eighty-six thousand, five hundred forty-six".