21320351133 has 8 divisors (see below), whose sum is σ = 28893153696. Its totient is φ = 13980558000.

The previous prime is 21320351113. The next prime is 21320351141. The reversal of 21320351133 is 33115302312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21320351133 - 2⁶ = 21320351069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320351113) 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, 58252143 + ... + 58252508.

It is an arithmetic number, because the mean of its divisors is an integer number (3611644212).

Almost surely, 2^21320351133 is an apocalyptic number.

It is an amenable number.

21320351133 is a deficient number, since it is larger than the sum of its proper divisors (7572802563).

21320351133 is a wasteful number, since it uses less digits than its factorization.

21320351133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116504715.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 21320351133 its reverse (33115302312), we get a palindrome (54435653445).

The spelling of 21320351133 in words is "twenty-one billion, three hundred twenty million, three hundred fifty-one thousand, one hundred thirty-three".