16947946394 has 12 divisors (see below), whose sum is σ = 25518309162. Its totient is φ = 8441854680.

The previous prime is 16947946381. The next prime is 16947946397. The reversal of 16947946394 is 49364974961.

It can be written as a sum of positive squares in only one way, i.e., 16183147369 + 764799025 = 127213^2 + 27655^2 .

It is not an unprimeable number, because it can be changed into a prime (16947946397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3061409 + ... + 3066939.

Almost surely, 2^16947946394 is an apocalyptic number.

16947946394 is a deficient number, since it is larger than the sum of its proper divisors (8570362768).

16947946394 is an frugal number, since it uses more digits than its factorization.

16947946394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341 (or 5810 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 62.

The spelling of 16947946394 in words is "sixteen billion, nine hundred forty-seven million, nine hundred forty-six thousand, three hundred ninety-four".