21403331333 has 4 divisors (see below), whose sum is σ = 22093761408. Its totient is φ = 20712901260.

The previous prime is 21403331317. The next prime is 21403331357. The reversal of 21403331333 is 33313330412.

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 21403331333 - 2⁴ = 21403331317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403331533) 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, 345214991 + ... + 345215052.

It is an arithmetic number, because the mean of its divisors is an integer number (5523440352).

Almost surely, 2^21403331333 is an apocalyptic number.

It is an amenable number.

21403331333 is a deficient number, since it is larger than the sum of its proper divisors (690430075).

21403331333 is an equidigital number, since it uses as much as digits as its factorization.

21403331333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690430074.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 21403331333 its reverse (33313330412), we get a palindrome (54716661745).

The spelling of 21403331333 in words is "twenty-one billion, four hundred three million, three hundred thirty-one thousand, three hundred thirty-three".