18838471466 has 4 divisors (see below), whose sum is σ = 28257707202. Its totient is φ = 9419235732.

The previous prime is 18838471453. The next prime is 18838471489. The reversal of 18838471466 is 66417483881.

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., 18571965841 + 266505625 = 136279^2 + 16325^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4709617865 + ... + 4709617868.

Almost surely, 2^18838471466 is an apocalyptic number.

18838471466 is a deficient number, since it is larger than the sum of its proper divisors (9419235736).

18838471466 is an equidigital number, since it uses as much as digits as its factorization.

18838471466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419235735.

The product of its digits is 6193152, while the sum is 56.

The spelling of 18838471466 in words is "eighteen billion, eight hundred thirty-eight million, four hundred seventy-one thousand, four hundred sixty-six".