21333330013 has 4 divisors (see below), whose sum is σ = 21347450208. Its totient is φ = 21319209820.

The previous prime is 21333329987. The next prime is 21333330049. The reversal of 21333330013 is 31003333312.

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 21333330013 - 2³³ = 12743395421 is a prime.

It is a super-2 number, since 2×21333330013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333330313) 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, 7057831 + ... + 7060852.

It is an arithmetic number, because the mean of its divisors is an integer number (5336862552).

Almost surely, 2^21333330013 is an apocalyptic number.

It is an amenable number.

21333330013 is a deficient number, since it is larger than the sum of its proper divisors (14120195).

21333330013 is a wasteful number, since it uses less digits than its factorization.

21333330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14120194.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 21333330013 its reverse (31003333312), we get a palindrome (52336663325).

The spelling of 21333330013 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty thousand, thirteen".