4368209021 has 12 divisors (see below), whose sum is σ = 4843925436. Its totient is φ = 3935944320.

The previous prime is 4368208997. The next prime is 4368209063. The reversal of 4368209021 is 1209028634.

It can be written as a sum of positive squares in 2 ways, for example, as 1504353796 + 2863855225 = 38786^2 + 53515^2 .

It is not a de Polignac number, because 4368209021 - 2²² = 4364014717 is a prime.

It is a super-2 number, since 2×4368209021² = 38162500102291556882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4368299021) 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, 146066 + ... + 173411.

It is an arithmetic number, because the mean of its divisors is an integer number (403660453).

Almost surely, 2^4368209021 is an apocalyptic number.

It is an amenable number.

4368209021 is a deficient number, since it is larger than the sum of its proper divisors (475716415).

4368209021 is a wasteful number, since it uses less digits than its factorization.

4368209021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319612 (or 319601 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 4368209021 is about 66092.4278643174. The cubic root of 4368209021 is about 1634.6864790521.

The spelling of 4368209021 in words is "four billion, three hundred sixty-eight million, two hundred nine thousand, twenty-one".