16840047338 has 4 divisors (see below), whose sum is σ = 25260071010. Its totient is φ = 8420023668.

The previous prime is 16840047337. The next prime is 16840047353. The reversal of 16840047338 is 83374004861.

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., 16839474289 + 573049 = 129767^2 + 757^2 .

It is not an unprimeable number, because it can be changed into a prime (16840047337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210011833 + ... + 4210011836.

Almost surely, 2^16840047338 is an apocalyptic number.

16840047338 is a deficient number, since it is larger than the sum of its proper divisors (8420023672).

16840047338 is an equidigital number, since it uses as much as digits as its factorization.

16840047338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8420023671.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 16840047338 in words is "sixteen billion, eight hundred forty million, forty-seven thousand, three hundred thirty-eight".