4002020209 has 16 divisors (see below), whose sum is σ = 4548156480. Its totient is φ = 3489280000.

The previous prime is 4002020207. The next prime is 4002020251. The reversal of 4002020209 is 9020202004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4002020209 - 2¹ = 4002020207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4002020203) 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, 48592 + ... + 101809.

It is an arithmetic number, because the mean of its divisors is an integer number (284259780).

Almost surely, 2^4002020209 is an apocalyptic number.

It is an amenable number.

4002020209 is a deficient number, since it is larger than the sum of its proper divisors (546136271).

4002020209 is a wasteful number, since it uses less digits than its factorization.

4002020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150512.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4002020209 is about 63261.5223417837. The cubic root of 4002020209 is about 1587.6682471484.

The spelling of 4002020209 in words is "four billion, two million, twenty thousand, two hundred nine".