16021112728 has 32 divisors (see below), whose sum is σ = 31206188160. Its totient is φ = 7702755840.

The previous prime is 16021112719. The next prime is 16021112729. The reversal of 16021112728 is 82721112061.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 16021112728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021112729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166801 + ... + 244672.

It is an arithmetic number, because the mean of its divisors is an integer number (975193380).

Almost surely, 2^16021112728 is an apocalyptic number.

It is an amenable number.

16021112728 is a deficient number, since it is larger than the sum of its proper divisors (15185075432).

16021112728 is a wasteful number, since it uses less digits than its factorization.

16021112728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411667 (or 411663 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

Adding to 16021112728 its reverse (82721112061), we get a palindrome (98742224789).

The spelling of 16021112728 in words is "sixteen billion, twenty-one million, one hundred twelve thousand, seven hundred twenty-eight".