4013420021 has 8 divisors (see below), whose sum is σ = 4328576280. Its totient is φ = 3699182592.

The previous prime is 4013420017. The next prime is 4013420101. The reversal of 4013420021 is 1200243104.

It can be written as a sum of positive squares in 4 ways, for example, as 830880625 + 3182539396 = 28825^2 + 56414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4013420021 - 2² = 4013420017 is a prime.

It is a super-2 number, since 2×4013420021² = 32215080529927280882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013420321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220616 + ... + 238113.

It is an arithmetic number, because the mean of its divisors is an integer number (541072035).

Almost surely, 2^4013420021 is an apocalyptic number.

It is an amenable number.

4013420021 is a deficient number, since it is larger than the sum of its proper divisors (315156259).

4013420021 is a wasteful number, since it uses less digits than its factorization.

4013420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459415.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4013420021 is about 63351.5589468799. The cubic root of 4013420021 is about 1589.1743166279.

Adding to 4013420021 its reverse (1200243104), we get a palindrome (5213663125).

The spelling of 4013420021 in words is "four billion, thirteen million, four hundred twenty thousand, twenty-one".