3811682021 has 12 divisors (see below), whose sum is σ = 4553837388. Its totient is φ = 3178852992.

The previous prime is 3811682009. The next prime is 3811682023. The reversal of 3811682021 is 1202861183.

It can be written as a sum of positive squares in 2 ways, for example, as 2449260100 + 1362421921 = 49490^2 + 36911^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3811682021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811682023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1049396 + ... + 1053021.

It is an arithmetic number, because the mean of its divisors is an integer number (379486449).

Almost surely, 2^3811682021 is an apocalyptic number.

It is an amenable number.

3811682021 is a deficient number, since it is larger than the sum of its proper divisors (742155367).

3811682021 is a wasteful number, since it uses less digits than its factorization.

3811682021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102468 (or 2102461 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 3811682021 is about 61738.8210204892. The cubic root of 3811682021 is about 1562.0882100847.

The spelling of 3811682021 in words is "three billion, eight hundred eleven million, six hundred eighty-two thousand, twenty-one".