16742305221 has 32 divisors (see below), whose sum is σ = 23933952000. Its totient is φ = 10379622528.

The previous prime is 16742305189. The next prime is 16742305241. The reversal of 16742305221 is 12250324761.

It is not a de Polignac number, because 16742305221 - 2⁵ = 16742305189 is a prime.

It is a super-2 number, since 2×16742305221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16742305241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693276 + ... + 717018.

It is an arithmetic number, because the mean of its divisors is an integer number (747936000).

Almost surely, 2^16742305221 is an apocalyptic number.

It is an amenable number.

16742305221 is a deficient number, since it is larger than the sum of its proper divisors (7191646779).

16742305221 is a wasteful number, since it uses less digits than its factorization.

16742305221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23993.

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 16742305221 its reverse (12250324761), we get a palindrome (28992629982).

The spelling of 16742305221 in words is "sixteen billion, seven hundred forty-two million, three hundred five thousand, two hundred twenty-one".