21320123330 has 64 divisors (see below), whose sum is σ = 42421470336. Its totient is φ = 7650240000.

The previous prime is 21320123329. The next prime is 21320123333. The reversal of 21320123330 is 3332102312.

It is not an unprimeable number, because it can be changed into a prime (21320123333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3474365 + ... + 3480495.

It is an arithmetic number, because the mean of its divisors is an integer number (662835474).

Almost surely, 2^21320123330 is an apocalyptic number.

21320123330 is a deficient number, since it is larger than the sum of its proper divisors (21101347006).

21320123330 is a wasteful number, since it uses less digits than its factorization.

21320123330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21320123330 its reverse (3332102312), we get a palindrome (24652225642).

The spelling of 21320123330 in words is "twenty-one billion, three hundred twenty million, one hundred twenty-three thousand, three hundred thirty".