3808670021 has 36 divisors (see below), whose sum is σ = 4533806700. Its totient is φ = 3193602048.

The previous prime is 3808670017. The next prime is 3808670039. The reversal of 3808670021 is 1200768083.

It can be written as a sum of positive squares in 18 ways, for example, as 3216477796 + 592192225 = 56714^2 + 24335^2 .

It is not a de Polignac number, because 3808670021 - 2² = 3808670017 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 (3808670081) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1415045 + ... + 1417733.

It is an arithmetic number, because the mean of its divisors is an integer number (125939075).

Almost surely, 2^3808670021 is an apocalyptic number.

It is an amenable number.

3808670021 is a deficient number, since it is larger than the sum of its proper divisors (725136679).

3808670021 is a wasteful number, since it uses less digits than its factorization.

3808670021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 3808670021 is about 61714.4231197214. The cubic root of 3808670021 is about 1561.6766464136.

The spelling of 3808670021 in words is "three billion, eight hundred eight million, six hundred seventy thousand, twenty-one".