16021112720 has 80 divisors (see below), whose sum is σ = 37499742720. Its totient is φ = 6365478912.

The previous prime is 16021112719. The next prime is 16021112729. The reversal of 16021112720 is 2721112061.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 9107201 + ... + 9108959.

It is an arithmetic number, because the mean of its divisors is an integer number (468746784).

Almost surely, 2^16021112720 is an apocalyptic number.

16021112720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16021112720 is an abundant number, since it is smaller than the sum of its proper divisors (21478630000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16021112720 is a wasteful number, since it uses less digits than its factorization.

16021112720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 16021112720 its reverse (2721112061), we get a palindrome (18742224781).

The spelling of 16021112720 in words is "sixteen billion, twenty-one million, one hundred twelve thousand, seven hundred twenty".