21320330262 has 128 divisors (see below), whose sum is σ = 54682214400. Its totient is φ = 5380784640.

The previous prime is 21320330233. The next prime is 21320330327. The reversal of 21320330262 is 26203302312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3950638 + ... + 3956030.

It is an arithmetic number, because the mean of its divisors is an integer number (427204800).

Almost surely, 2^21320330262 is an apocalyptic number.

21320330262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21320330262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27341107200).

21320330262 is an abundant number, since it is smaller than the sum of its proper divisors (33361884138).

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

21320330262 is a wasteful number, since it uses less digits than its factorization.

21320330262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21320330262 its reverse (26203302312), we get a palindrome (47523632574).

The spelling of 21320330262 in words is "twenty-one billion, three hundred twenty million, three hundred thirty thousand, two hundred sixty-two".