18446393774 has 8 divisors (see below), whose sum is σ = 27670800960. Its totient is φ = 9222793456.

The previous prime is 18446393767. The next prime is 18446393803. The reversal of 18446393774 is 47739364481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 140894 + ... + 238209.

It is an arithmetic number, because the mean of its divisors is an integer number (3458850120).

Almost surely, 2^18446393774 is an apocalyptic number.

18446393774 is a deficient number, since it is larger than the sum of its proper divisors (9224407186).

18446393774 is a wasteful number, since it uses less digits than its factorization.

18446393774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403434.

The product of its digits is 12192768, while the sum is 56.

The spelling of 18446393774 in words is "eighteen billion, four hundred forty-six million, three hundred ninety-three thousand, seven hundred seventy-four".