16168634 has 4 divisors (see below), whose sum is σ = 24252954. Its totient is φ = 8084316.

The previous prime is 16168591. The next prime is 16168643. The reversal of 16168634 is 43686161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43686161 = 31 ⋅1409231.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 5508409 = 3265^2 + 2347^2 .

It is a super-2 number, since 2×16168634² = 522849450851912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16168594 and 16168603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4042157 + ... + 4042160.

Almost surely, 2^16168634 is an apocalyptic number.

16168634 is a deficient number, since it is larger than the sum of its proper divisors (8084320).

16168634 is an equidigital number, since it uses as much as digits as its factorization.

16168634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8084319.

The product of its digits is 20736, while the sum is 35.

The square root of 16168634 is about 4021.0239989336. The cubic root of 16168634 is about 252.8663909408.

The spelling of 16168634 in words is "sixteen million, one hundred sixty-eight thousand, six hundred thirty-four".