18614665154 has 4 divisors (see below), whose sum is σ = 27921997734. Its totient is φ = 9307332576.

The previous prime is 18614665133. The next prime is 18614665171. The reversal of 18614665154 is 45156641681.

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., 16857127225 + 1757537929 = 129835^2 + 41923^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18614665099 and 18614665108.

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, 4653666287 + ... + 4653666290.

Almost surely, 2^18614665154 is an apocalyptic number.

18614665154 is a deficient number, since it is larger than the sum of its proper divisors (9307332580).

18614665154 is an equidigital number, since it uses as much as digits as its factorization.

18614665154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9307332579.

The product of its digits is 691200, while the sum is 47.

The spelling of 18614665154 in words is "eighteen billion, six hundred fourteen million, six hundred sixty-five thousand, one hundred fifty-four".