16990209994 has 16 divisors (see below), whose sum is σ = 25542003816. Its totient is φ = 8476228800.

The previous prime is 16990209991. The next prime is 16990210031. The reversal of 16990209994 is 49990209961.

It can be written as a sum of positive squares in 4 ways, for example, as 16940324025 + 49885969 = 130155^2 + 7063^2 .

It is not an unprimeable number, because it can be changed into a prime (16990209991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2190964 + ... + 2198704.

Almost surely, 2^16990209994 is an apocalyptic number.

16990209994 is a deficient number, since it is larger than the sum of its proper divisors (8551793822).

16990209994 is a wasteful number, since it uses less digits than its factorization.

16990209994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10041.

The product of its (nonzero) digits is 2834352, while the sum is 58.

The spelling of 16990209994 in words is "sixteen billion, nine hundred ninety million, two hundred nine thousand, nine hundred ninety-four".