16994451 has 4 divisors (see below), whose sum is σ = 22659272. Its totient is φ = 11329632.

The previous prime is 16994449. The next prime is 16994491. The reversal of 16994451 is 15449961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15449961 = 3 ⋅5149987.

It is not a de Polignac number, because 16994451 - 2¹ = 16994449 is a prime.

It is a super-2 number, since 2×16994451² = 577622729582802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16994491) 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, 2832406 + ... + 2832411.

It is an arithmetic number, because the mean of its divisors is an integer number (5664818).

Almost surely, 2^16994451 is an apocalyptic number.

16994451 is a deficient number, since it is larger than the sum of its proper divisors (5664821).

16994451 is an equidigital number, since it uses as much as digits as its factorization.

16994451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664820.

The product of its digits is 38880, while the sum is 39.

The square root of 16994451 is about 4122.4326556052. The cubic root of 16994451 is about 257.1001794693.

The spelling of 16994451 in words is "sixteen million, nine hundred ninety-four thousand, four hundred fifty-one".