4006016021 has 16 divisors (see below), whose sum is σ = 4684896000. Its totient is φ = 3424058064.

The previous prime is 4006015969. The next prime is 4006016029. The reversal of 4006016021 is 1206106004.

It is a happy number.

It is not a de Polignac number, because 4006016021 - 2¹⁴ = 4005999637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4006015984 and 4006016002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006016029) 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, 106871 + ... + 139403.

It is an arithmetic number, because the mean of its divisors is an integer number (292806000).

Almost surely, 2^4006016021 is an apocalyptic number.

It is an amenable number.

4006016021 is a deficient number, since it is larger than the sum of its proper divisors (678879979).

4006016021 is an equidigital number, since it uses as much as digits as its factorization.

4006016021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32913 (or 32899 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4006016021 is about 63293.0961559000. The cubic root of 4006016021 is about 1588.1964731675.

The spelling of 4006016021 in words is "four billion, six million, sixteen thousand, twenty-one".