21030330333 has 8 divisors (see below), whose sum is σ = 28042557088. Its totient is φ = 14019161904.

The previous prime is 21030330331. The next prime is 21030330371. The reversal of 21030330333 is 33303303012.

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

It is not a de Polignac number, because 21030330333 - 2¹ = 21030330331 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030330331) 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, 216991 + ... + 298572.

It is an arithmetic number, because the mean of its divisors is an integer number (3505319636).

Almost surely, 2^21030330333 is an apocalyptic number.

It is an amenable number.

21030330333 is a deficient number, since it is larger than the sum of its proper divisors (7012226755).

21030330333 is a wasteful number, since it uses less digits than its factorization.

21030330333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529163.

The product of its (nonzero) digits is 1458, while the sum is 21.

Adding to 21030330333 its reverse (33303303012), we get a palindrome (54333633345).

The spelling of 21030330333 in words is "twenty-one billion, thirty million, three hundred thirty thousand, three hundred thirty-three".