16823242 has 4 divisors (see below), whose sum is σ = 25234866. Its totient is φ = 8411620.

The previous prime is 16823221. The next prime is 16823249. The reversal of 16823242 is 24232861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24232861 = 73 ⋅331957.

It can be written as a sum of positive squares in only one way, i.e., 16818201 + 5041 = 4101^2 + 71^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16823242.

It is not an unprimeable number, because it can be changed into a prime (16823249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4205809 + ... + 4205812.

Almost surely, 2^16823242 is an apocalyptic number.

16823242 is a deficient number, since it is larger than the sum of its proper divisors (8411624).

16823242 is an equidigital number, since it uses as much as digits as its factorization.

16823242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8411623.

The product of its digits is 4608, while the sum is 28.

The square root of 16823242 is about 4101.6145601458. The cubic root of 16823242 is about 256.2338865934.

The spelling of 16823242 in words is "sixteen million, eight hundred twenty-three thousand, two hundred forty-two".