18138380170 has 16 divisors (see below), whose sum is σ = 32985674568. Its totient is φ = 7180554240.

The previous prime is 18138380149. The next prime is 18138380257. The reversal of 18138380170 is 7108383181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9784968561 + 8353411609 = 98919^2 + 91397^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9348711 + ... + 9350650.

Almost surely, 2^18138380170 is an apocalyptic number.

18138380170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18138380170 is a deficient number, since it is larger than the sum of its proper divisors (14847294398).

18138380170 is a wasteful number, since it uses less digits than its factorization.

18138380170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18699465.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 18138380170 in words is "eighteen billion, one hundred thirty-eight million, three hundred eighty thousand, one hundred seventy".