3820021320 has 32 divisors (see below), whose sum is σ = 11460064320. Its totient is φ = 1018672320.

The previous prime is 3820021319. The next prime is 3820021321. The reversal of 3820021320 is 231200283.

It is an interprime number because it is at equal distance from previous prime (3820021319) and next prime (3820021321).

It is not an unprimeable number, because it can be changed into a prime (3820021321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15916636 + ... + 15916875.

It is an arithmetic number, because the mean of its divisors is an integer number (358127010).

Almost surely, 2^3820021320 is an apocalyptic number.

3820021320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3820021320 is an abundant number, since it is smaller than the sum of its proper divisors (7640043000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3820021320 is a wasteful number, since it uses less digits than its factorization.

3820021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31833525 (or 31833521 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3820021320 is about 61806.3210359588. The cubic root of 3820021320 is about 1563.2265729770.

The spelling of 3820021320 in words is "three billion, eight hundred twenty million, twenty-one thousand, three hundred twenty".