18202044338 has 4 divisors (see below), whose sum is σ = 27303066510. Its totient is φ = 9101022168.

The previous prime is 18202044319. The next prime is 18202044349. The reversal of 18202044338 is 83344020281.

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., 13561301209 + 4640743129 = 116453^2 + 68123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18202044298 and 18202044307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4550511083 + ... + 4550511086.

Almost surely, 2^18202044338 is an apocalyptic number.

18202044338 is a deficient number, since it is larger than the sum of its proper divisors (9101022172).

18202044338 is an equidigital number, since it uses as much as digits as its factorization.

18202044338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101022171.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 18202044338 in words is "eighteen billion, two hundred two million, forty-four thousand, three hundred thirty-eight".