16995434 has 4 divisors (see below), whose sum is σ = 25493154. Its totient is φ = 8497716.

The previous prime is 16995397. The next prime is 16995437. The reversal of 16995434 is 43459961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43459961 = 263 ⋅165247.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 4214809 = 3575^2 + 2053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16995391 and 16995400.

It is not an unprimeable number, because it can be changed into a prime (16995437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248857 + ... + 4248860.

Almost surely, 2^16995434 is an apocalyptic number.

16995434 is a deficient number, since it is larger than the sum of its proper divisors (8497720).

16995434 is an equidigital number, since it uses as much as digits as its factorization.

16995434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497719.

The product of its digits is 116640, while the sum is 41.

The square root of 16995434 is about 4122.5518796008. The cubic root of 16995434 is about 257.1051364717.

The spelling of 16995434 in words is "sixteen million, nine hundred ninety-five thousand, four hundred thirty-four".