16900042 has 4 divisors (see below), whose sum is σ = 25350066. Its totient is φ = 8450020.

The previous prime is 16900033. The next prime is 16900049. The reversal of 16900042 is 24000961.

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

It can be written as a sum of positive squares in only one way, i.e., 16491721 + 408321 = 4061^2 + 639^2 .

It is a super-2 number, since 2×16900042² = 571222839203528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 16899986 and 16900022.

It is not an unprimeable number, because it can be changed into a prime (16900049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4225009 + ... + 4225012.

Almost surely, 2^16900042 is an apocalyptic number.

16900042 is a deficient number, since it is larger than the sum of its proper divisors (8450024).

16900042 is an equidigital number, since it uses as much as digits as its factorization.

16900042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450023.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16900042 is about 4110.9660665104. The cubic root of 16900042 is about 256.6232069742.

The spelling of 16900042 in words is "sixteen million, nine hundred thousand, forty-two".