16244663 has 4 divisors (see below), whose sum is σ = 16257000. Its totient is φ = 16232328.

The previous prime is 16244629. The next prime is 16244689. The reversal of 16244663 is 36644261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36644261 = 421 ⋅87041.

It is a cyclic number.

It is not a de Polignac number, because 16244663 - 2⁸ = 16244407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16244603) 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, 3920 + ... + 6917.

It is an arithmetic number, because the mean of its divisors is an integer number (4064250).

Almost surely, 2^16244663 is an apocalyptic number.

16244663 is a deficient number, since it is larger than the sum of its proper divisors (12337).

16244663 is a wasteful number, since it uses less digits than its factorization.

16244663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12336.

The product of its digits is 20736, while the sum is 32.

The square root of 16244663 is about 4030.4668464087. The cubic root of 16244663 is about 253.2621185252.

The spelling of 16244663 in words is "sixteen million, two hundred forty-four thousand, six hundred sixty-three".