16826109 has 4 divisors (see below), whose sum is σ = 22434816. Its totient is φ = 11217404.

The previous prime is 16826101. The next prime is 16826129. The reversal of 16826109 is 90162861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90162861 = 3 ⋅30054287.

It is a cyclic number.

It is not a de Polignac number, because 16826109 - 2³ = 16826101 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16826109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16826101) 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, 2804349 + ... + 2804354.

It is an arithmetic number, because the mean of its divisors is an integer number (5608704).

Almost surely, 2^16826109 is an apocalyptic number.

It is an amenable number.

16826109 is a deficient number, since it is larger than the sum of its proper divisors (5608707).

16826109 is an equidigital number, since it uses as much as digits as its factorization.

16826109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608706.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 16826109 is about 4101.9640417732. The cubic root of 16826109 is about 256.2484414738.

The spelling of 16826109 in words is "sixteen million, eight hundred twenty-six thousand, one hundred nine".