16997956 has 12 divisors (see below), whose sum is σ = 30123520. Its totient is φ = 8391240.

The previous prime is 16997947. The next prime is 16997957. The reversal of 16997956 is 65979961.

It is not an unprimeable number, because it can be changed into a prime (16997957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26580 + ... + 27211.

Almost surely, 2^16997956 is an apocalyptic number.

It is an amenable number.

16997956 is a deficient number, since it is larger than the sum of its proper divisors (13125564).

16997956 is a wasteful number, since it uses less digits than its factorization.

16997956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53874 (or 53872 counting only the distinct ones).

The product of its digits is 918540, while the sum is 52.

The square root of 16997956 is about 4122.8577467577. The cubic root of 16997956 is about 257.1178533595.

The spelling of 16997956 in words is "sixteen million, nine hundred ninety-seven thousand, nine hundred fifty-six".