16442003 has 4 divisors (see below), whose sum is σ = 16459248. Its totient is φ = 16424760.

The previous prime is 16441991. The next prime is 16442029. The reversal of 16442003 is 30024461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16442003 - 2⁶ = 16441939 is a prime.

It is a super-3 number, since 3×16442003³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442053) 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, 7103 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (4114812).

Almost surely, 2^16442003 is an apocalyptic number.

16442003 is a deficient number, since it is larger than the sum of its proper divisors (17245).

16442003 is a wasteful number, since it uses less digits than its factorization.

16442003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17244.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 16442003 is about 4054.8739807792. The cubic root of 16442003 is about 254.2835354446.

Adding to 16442003 its reverse (30024461), we get a palindrome (46466464).

The spelling of 16442003 in words is "sixteen million, four hundred forty-two thousand, three".