208570018338 has 160 divisors (see below), whose sum is σ = 524109180672. Its totient is φ = 61444742400.

The previous prime is 208570018337. The next prime is 208570018361. The reversal of 208570018338 is 833810075802.

It is a junction number, because it is equal to n+sod(n) for n = 208570018293 and 208570018302.

It is not an unprimeable number, because it can be changed into a prime (208570018337) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 21402295 + ... + 21412037.

Almost surely, 2^208570018338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208570018338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262054590336).

208570018338 is an abundant number, since it is smaller than the sum of its proper divisors (315539162334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208570018338 is a wasteful number, since it uses less digits than its factorization.

208570018338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102 (or 10093 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 208570018338 in words is "two hundred eight billion, five hundred seventy million, eighteen thousand, three hundred thirty-eight".