4200021824 has 14 divisors (see below), whose sum is σ = 8334418434. Its totient is φ = 2100010880.

The previous prime is 4200021821. The next prime is 4200021829. The reversal of 4200021824 is 4281200024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4188678400 + 11343424 = 64720^2 + 3368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4200021824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4200021821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32812607 + ... + 32812734.

Almost surely, 2^4200021824 is an apocalyptic number.

It is an amenable number.

4200021824 is a deficient number, since it is larger than the sum of its proper divisors (4134396610).

4200021824 is an equidigital number, since it uses as much as digits as its factorization.

4200021824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65625353 (or 65625343 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 4200021824 is about 64807.5753596754. The cubic root of 4200021824 is about 1613.4314405806.

Adding to 4200021824 its reverse (4281200024), we get a palindrome (8481221848).

The spelling of 4200021824 in words is "four billion, two hundred million, twenty-one thousand, eight hundred twenty-four".