6436813020 has 96 divisors (see below), whose sum is σ = 20818135296. Its totient is φ = 1468646400.

The previous prime is 6436813007. The next prime is 6436813021. The reversal of 6436813020 is 203186346.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436813021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275626 + ... + 298065.

It is an arithmetic number, because the mean of its divisors is an integer number (216855576).

Almost surely, 2^6436813020 is an apocalyptic number.

6436813020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6436813020 is an abundant number, since it is smaller than the sum of its proper divisors (14381322276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6436813020 is a wasteful number, since it uses less digits than its factorization.

6436813020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573731 (or 573729 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6436813020 is about 80229.7514641545. The cubic root of 6436813020 is about 1860.1885402589.

Adding to 6436813020 its reverse (203186346), we get a palindrome (6639999366).

The spelling of 6436813020 in words is "six billion, four hundred thirty-six million, eight hundred thirteen thousand, twenty".