16644046 has 4 divisors (see below), whose sum is σ = 24966072. Its totient is φ = 8322022.

The previous prime is 16644029. The next prime is 16644049. The reversal of 16644046 is 64044661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64044661 = 17 ⋅3767333.

It is a junction number, because it is equal to n+sod(n) for n = 16643999 and 16644017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161010 + ... + 4161013.

It is an arithmetic number, because the mean of its divisors is an integer number (6241518).

Almost surely, 2^16644046 is an apocalyptic number.

16644046 is a deficient number, since it is larger than the sum of its proper divisors (8322026).

16644046 is an equidigital number, since it uses as much as digits as its factorization.

16644046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322025.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 16644046 is about 4079.7115094085. The cubic root of 16644046 is about 255.3208622747.

The spelling of 16644046 in words is "sixteen million, six hundred forty-four thousand, forty-six".