6420033530 has 16 divisors (see below), whose sum is σ = 11568410280. Its totient is φ = 2565268992.

The previous prime is 6420033523. The next prime is 6420033541. The reversal of 6420033530 is 353300246.

It can be written as a sum of positive squares in 4 ways, for example, as 5025533881 + 1394499649 = 70891^2 + 37343^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6420033530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333215 + ... + 351954.

Almost surely, 2^6420033530 is an apocalyptic number.

6420033530 is a deficient number, since it is larger than the sum of its proper divisors (5148376750).

6420033530 is a wasteful number, since it uses less digits than its factorization.

6420033530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686113.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 6420033530 is about 80125.1117315914. Note that the first 3 decimals coincide. The cubic root of 6420033530 is about 1858.5707533045.

Adding to 6420033530 its reverse (353300246), we get a palindrome (6773333776).

The spelling of 6420033530 in words is "six billion, four hundred twenty million, thirty-three thousand, five hundred thirty".