16021000004 has 48 divisors (see below), whose sum is σ = 29605564800. Its totient is φ = 7575380736.

The previous prime is 16021000003. The next prime is 16021000057. The reversal of 16021000004 is 40000012061.

It is a super-2 number, since 2×16021000004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16021000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097417 + ... + 1111919.

It is an arithmetic number, because the mean of its divisors is an integer number (616782600).

Almost surely, 2^16021000004 is an apocalyptic number.

It is an amenable number.

16021000004 is a deficient number, since it is larger than the sum of its proper divisors (13584564796).

16021000004 is a wasteful number, since it uses less digits than its factorization.

16021000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14732 (or 14730 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 16021000004 its reverse (40000012061), we get a palindrome (56021012065).

The spelling of 16021000004 in words is "sixteen billion, twenty-one million, four", and thus it is an aban number.