4315020021 has 12 divisors (see below), whose sum is σ = 6712253548. Its totient is φ = 2655396864.

The previous prime is 4315019987. The next prime is 4315020043. The reversal of 4315020021 is 1200205134.

It can be written as a sum of positive squares in 2 ways, for example, as 879419025 + 3435600996 = 29655^2 + 58614^2 .

It is not a de Polignac number, because 4315020021 - 2²¹ = 4312922869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4315019976 and 4315020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4315020421) 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, 18440140 + ... + 18440373.

Almost surely, 2^4315020021 is an apocalyptic number.

It is an amenable number.

4315020021 is a deficient number, since it is larger than the sum of its proper divisors (2397233527).

4315020021 is a wasteful number, since it uses less digits than its factorization.

4315020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36880532 (or 36880529 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4315020021 is about 65688.8119926065. The cubic root of 4315020021 is about 1628.0245079036.

Adding to 4315020021 its reverse (1200205134), we get a palindrome (5515225155).

The spelling of 4315020021 in words is "four billion, three hundred fifteen million, twenty thousand, twenty-one".