21320220332010 has 16 divisors (see below), whose sum is σ = 51168528796896. Its totient is φ = 5685392088528.

The previous prime is 21320220331961. The next prime is 21320220332011. The reversal of 21320220332010 is 1023302202312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21320220332011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355337005504 + ... + 355337005563.

It is an arithmetic number, because the mean of its divisors is an integer number (3198033049806).

Almost surely, 2^{21320220332010} is an apocalyptic number.

21320220332010 is an abundant number, since it is smaller than the sum of its proper divisors (29848308464886).

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

21320220332010 is a wasteful number, since it uses less digits than its factorization.

21320220332010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710674011077.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21320220332010 its reverse (1023302202312), we get a palindrome (22343522534322).

The spelling of 21320220332010 in words is "twenty-one trillion, three hundred twenty billion, two hundred twenty million, three hundred thirty-two thousand, ten".