21230320030 has 16 divisors (see below), whose sum is σ = 38261827440. Its totient is φ = 8481627712.

The previous prime is 21230319991. The next prime is 21230320037. The reversal of 21230320030 is 3002303212.

21230320030 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21230319986 and 21230320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230320037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304044 + ... + 1320223.

It is an arithmetic number, because the mean of its divisors is an integer number (2391364215).

Almost surely, 2^21230320030 is an apocalyptic number.

21230320030 is a deficient number, since it is larger than the sum of its proper divisors (17031507410).

21230320030 is a wasteful number, since it uses less digits than its factorization.

21230320030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625083.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21230320030 its reverse (3002303212), we get a palindrome (24232623242).

The spelling of 21230320030 in words is "twenty-one billion, two hundred thirty million, three hundred twenty thousand, thirty".