6420620532 has 24 divisors (see below), whose sum is σ = 15498050400. Its totient is φ = 2066406496.

The previous prime is 6420620513. The next prime is 6420620579. The reversal of 6420620532 is 2350260246.

It is a self number, because there is not a number n which added to its sum of digits gives 6420620532.

It is a congruent number.

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, 9224682 + ... + 9225377.

It is an arithmetic number, because the mean of its divisors is an integer number (645752100).

Almost surely, 2^6420620532 is an apocalyptic number.

It is an amenable number.

6420620532 is an abundant number, since it is smaller than the sum of its proper divisors (9077429868).

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

6420620532 is a wasteful number, since it uses less digits than its factorization.

6420620532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450095 (or 18450093 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6420620532 is about 80128.7746817584. The cubic root of 6420620532 is about 1858.6273963887.

Adding to 6420620532 its reverse (2350260246), we get a palindrome (8770880778).

The spelling of 6420620532 in words is "six billion, four hundred twenty million, six hundred twenty thousand, five hundred thirty-two".