16909994 has 8 divisors (see below), whose sum is σ = 25498368. Its totient is φ = 8410540.

The previous prime is 16909979. The next prime is 16910011. The reversal of 16909994 is 49990961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21752 + ... + 22515.

It is an arithmetic number, because the mean of its divisors is an integer number (3187296).

Almost surely, 2^16909994 is an apocalyptic number.

16909994 is a deficient number, since it is larger than the sum of its proper divisors (8588374).

16909994 is a wasteful number, since it uses less digits than its factorization.

16909994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44460.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 16909994 is about 4112.1763094498. The cubic root of 16909994 is about 256.6735700248.

The spelling of 16909994 in words is "sixteen million, nine hundred nine thousand, nine hundred ninety-four".