21331003330 has 32 divisors (see below), whose sum is σ = 47256378624. Its totient is φ = 6750910656.

The previous prime is 21331003303. The next prime is 21331003363. The reversal of 21331003330 is 3330013312.

It is a junction number, because it is equal to n+sod(n) for n = 21331003298 and 21331003307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11719422 + ... + 11721241.

It is an arithmetic number, because the mean of its divisors is an integer number (1476761832).

Almost surely, 2^21331003330 is an apocalyptic number.

21331003330 is an abundant number, since it is smaller than the sum of its proper divisors (25925375294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21331003330 is a wasteful number, since it uses less digits than its factorization.

21331003330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23440690.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21331003330 its reverse (3330013312), we get a palindrome (24661016642).

The spelling of 21331003330 in words is "twenty-one billion, three hundred thirty-one million, three thousand, three hundred thirty".