21320232333 has 4 divisors (see below), whose sum is σ = 28426976448. Its totient is φ = 14213488220.

The previous prime is 21320232331. The next prime is 21320232337. The reversal of 21320232333 is 33323202312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21320232333 - 2¹ = 21320232331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320232331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553372053 + ... + 3553372058.

It is an arithmetic number, because the mean of its divisors is an integer number (7106744112).

Almost surely, 2^21320232333 is an apocalyptic number.

It is an amenable number.

21320232333 is a deficient number, since it is larger than the sum of its proper divisors (7106744115).

21320232333 is an equidigital number, since it uses as much as digits as its factorization.

21320232333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106744114.

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21320232333 its reverse (33323202312), we get a palindrome (54643434645).

The spelling of 21320232333 in words is "twenty-one billion, three hundred twenty million, two hundred thirty-two thousand, three hundred thirty-three".