18203344834 has 8 divisors (see below), whose sum is σ = 28246569660. Its totient is φ = 8787821616.

The previous prime is 18203344793. The next prime is 18203344849. The reversal of 18203344834 is 43844330281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17094255025 + 1109089809 = 130745^2 + 33303^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 156925329 + ... + 156925444.

Almost surely, 2^18203344834 is an apocalyptic number.

18203344834 is a deficient number, since it is larger than the sum of its proper divisors (10043224826).

18203344834 is a wasteful number, since it uses less digits than its factorization.

18203344834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313850804.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 18203344834 in words is "eighteen billion, two hundred three million, three hundred forty-four thousand, eight hundred thirty-four".