16064052021 has 12 divisors (see below), whose sum is σ = 23205239148. Its totient is φ = 10708625664.

The previous prime is 16064052007. The next prime is 16064052077. The reversal of 16064052021 is 12025046061.

16064052021 is a `hidden beast` number, since 1 + 60 + 64 + 0 + 520 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13967694225 + 2096357796 = 118185^2 + 45786^2 .

It is not a de Polignac number, because 16064052021 - 2¹⁷ = 16063920949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16064050021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96531 + ... + 203583.

It is an arithmetic number, because the mean of its divisors is an integer number (1933769929).

Almost surely, 2^16064052021 is an apocalyptic number.

It is an amenable number.

16064052021 is a deficient number, since it is larger than the sum of its proper divisors (7141187127).

16064052021 is a wasteful number, since it uses less digits than its factorization.

16064052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123732 (or 123729 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 16064052021 its reverse (12025046061), we get a palindrome (28089098082).

The spelling of 16064052021 in words is "sixteen billion, sixty-four million, fifty-two thousand, twenty-one".