20421330214020 has 96 divisors (see below), whose sum is σ = 58561595000832. Its totient is φ = 5314306935168.

The previous prime is 20421330213989. The next prime is 20421330214093. The reversal of 20421330214020 is 2041203312402.

It is a happy number.

It is a super-2 number, since 2×20421330214020² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 626812 + ... + 6421491.

It is an arithmetic number, because the mean of its divisors is an integer number (610016614592).

Almost surely, 2^{20421330214020} is an apocalyptic number.

20421330214020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20421330214020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29280797500416).

20421330214020 is an abundant number, since it is smaller than the sum of its proper divisors (38140264786812).

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

20421330214020 is a wasteful number, since it uses less digits than its factorization.

20421330214020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049481 (or 7049479 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20421330214020 its reverse (2041203312402), we get a palindrome (22462533526422).

The spelling of 20421330214020 in words is "twenty trillion, four hundred twenty-one billion, three hundred thirty million, two hundred fourteen thousand, twenty".