21320230330 has 32 divisors (see below), whose sum is σ = 44878737024. Its totient is φ = 7139797056.

The previous prime is 21320230319. The next prime is 21320230357. The reversal of 21320230330 is 3303202312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21320230298 and 21320230307.

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, 3538557 + ... + 3544576.

It is an arithmetic number, because the mean of its divisors is an integer number (1402460532).

Almost surely, 2^21320230330 is an apocalyptic number.

21320230330 is an abundant number, since it is smaller than the sum of its proper divisors (23558506694).

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

21320230330 is a wasteful number, since it uses less digits than its factorization.

21320230330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083190.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21320230330 its reverse (3303202312), we get a palindrome (24623432642).

The spelling of 21320230330 in words is "twenty-one billion, three hundred twenty million, two hundred thirty thousand, three hundred thirty".