6303421656020 has 54 divisors (see below), whose sum is σ = 13605513176682. Its totient is φ = 2453061879936.

The previous prime is 6303421655959. The next prime is 6303421656023. The reversal of 6303421656020 is 206561243036.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 1448547045136 + 4854874610884 = 1203556^2 + 2203378^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6303421656023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 415429154 + ... + 415444326.

Almost surely, 2^{6303421656020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6303421656020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6802756588341).

6303421656020 is an abundant number, since it is smaller than the sum of its proper divisors (7302091520662).

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

6303421656020 is an frugal number, since it uses more digits than its factorization.

6303421656020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30429 (or 15217 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 6303421656020 its reverse (206561243036), we get a palindrome (6509982899056).

The spelling of 6303421656020 in words is "six trillion, three hundred three billion, four hundred twenty-one million, six hundred fifty-six thousand, twenty".