16306421242 has 4 divisors (see below), whose sum is σ = 24459631866. Its totient is φ = 8153210620.

The previous prime is 16306421227. The next prime is 16306421249. The reversal of 16306421242 is 24212460361.

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., 15365833681 + 940587561 = 123959^2 + 30669^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16306421249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4076605309 + ... + 4076605312.

Almost surely, 2^16306421242 is an apocalyptic number.

16306421242 is a deficient number, since it is larger than the sum of its proper divisors (8153210624).

16306421242 is an equidigital number, since it uses as much as digits as its factorization.

16306421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153210623.

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

The spelling of 16306421242 in words is "sixteen billion, three hundred six million, four hundred twenty-one thousand, two hundred forty-two".