18479453774 has 4 divisors (see below), whose sum is σ = 27719180664. Its totient is φ = 9239726886.

The previous prime is 18479453737. The next prime is 18479453809. The reversal of 18479453774 is 47735497481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47735497481 = 7 ⋅6819356783.

It is a congruent number.

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, 4619863442 + ... + 4619863445.

It is an arithmetic number, because the mean of its divisors is an integer number (6929795166).

Almost surely, 2^18479453774 is an apocalyptic number.

18479453774 is a deficient number, since it is larger than the sum of its proper divisors (9239726890).

18479453774 is an equidigital number, since it uses as much as digits as its factorization.

18479453774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239726889.

The product of its digits is 23708160, while the sum is 59.

The spelling of 18479453774 in words is "eighteen billion, four hundred seventy-nine million, four hundred fifty-three thousand, seven hundred seventy-four".