3438118021 has 4 divisors (see below), whose sum is σ = 3702588652. Its totient is φ = 3173647392.

The previous prime is 3438117989. The next prime is 3438118031. The reversal of 3438118021 is 1208118343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 954192100 + 2483925921 = 30890^2 + 49839^2 .

It is a cyclic number.

It is not a de Polignac number, because 3438118021 - 2⁵ = 3438117989 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 (3438118031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132235296 + ... + 132235321.

It is an arithmetic number, because the mean of its divisors is an integer number (925647163).

Almost surely, 2^3438118021 is an apocalyptic number.

It is an amenable number.

3438118021 is a deficient number, since it is larger than the sum of its proper divisors (264470631).

3438118021 is a wasteful number, since it uses less digits than its factorization.

3438118021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264470630.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 3438118021 is about 58635.4672617180. The cubic root of 3438118021 is about 1509.2931242538.

The spelling of 3438118021 in words is "three billion, four hundred thirty-eight million, one hundred eighteen thousand, twenty-one".