3804521207820 has 24 divisors (see below), whose sum is σ = 10652659382064. Its totient is φ = 1014538988736.

The previous prime is 3804521207803. The next prime is 3804521207821. The reversal of 3804521207820 is 287021254083.

It is not an unprimeable number, because it can be changed into a prime (3804521207821) 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, 31704343339 + ... + 31704343458.

It is an arithmetic number, because the mean of its divisors is an integer number (443860807586).

Almost surely, 2^{3804521207820} is an apocalyptic number.

3804521207820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3804521207820 is an abundant number, since it is smaller than the sum of its proper divisors (6848138174244).

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

3804521207820 is a wasteful number, since it uses less digits than its factorization.

3804521207820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63408686809 (or 63408686807 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 3804521207820 in words is "three trillion, eight hundred four billion, five hundred twenty-one million, two hundred seven thousand, eight hundred twenty".