3902020910820 has 72 divisors (see below), whose sum is σ = 11944718505720. Its totient is φ = 1030992675840.

The previous prime is 3902020910783. The next prime is 3902020910833. The reversal of 3902020910820 is 280190202093.

3902020910820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 165872111076 + 3736148799744 = 407274^2 + 1932912^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99420261 + ... + 99459500.

It is an arithmetic number, because the mean of its divisors is an integer number (165898868135).

Almost surely, 2^{3902020910820} is an apocalyptic number.

3902020910820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3902020910820 is an abundant number, since it is smaller than the sum of its proper divisors (8042697594900).

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

3902020910820 is a wasteful number, since it uses less digits than its factorization.

3902020910820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198879885 (or 198879880 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 3902020910820 in words is "three trillion, nine hundred two billion, twenty million, nine hundred ten thousand, eight hundred twenty".