21230030420320 has 96 divisors (see below), whose sum is σ = 50763181684320. Its totient is φ = 8389211811840.

The previous prime is 21230030420303. The next prime is 21230030420341. The reversal of 21230030420320 is 2302403003212.

It is a junction number, because it is equal to n+sod(n) for n = 21230030420291 and 21230030420300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303559116 + ... + 303629044.

It is an arithmetic number, because the mean of its divisors is an integer number (528783142545).

Almost surely, 2^{21230030420320} is an apocalyptic number.

21230030420320 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 21230030420320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25381590842160).

21230030420320 is an abundant number, since it is smaller than the sum of its proper divisors (29533151264000).

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

21230030420320 is a wasteful number, since it uses less digits than its factorization.

21230030420320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92888 (or 92880 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21230030420320 its reverse (2302403003212), we get a palindrome (23532433423532).

The spelling of 21230030420320 in words is "twenty-one trillion, two hundred thirty billion, thirty million, four hundred twenty thousand, three hundred twenty".