21321032330 has 64 divisors (see below), whose sum is σ = 42328935936. Its totient is φ = 7684320000.

The previous prime is 21321032303. The next prime is 21321032363. The reversal of 21321032330 is 3323012312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 920795 + ... + 943665.

It is an arithmetic number, because the mean of its divisors is an integer number (661389624).

Almost surely, 2^21321032330 is an apocalyptic number.

21321032330 is a deficient number, since it is larger than the sum of its proper divisors (21007903606).

21321032330 is a wasteful number, since it uses less digits than its factorization.

21321032330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23063.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21321032330 its reverse (3323012312), we get a palindrome (24644044642).

The spelling of 21321032330 in words is "twenty-one billion, three hundred twenty-one million, thirty-two thousand, three hundred thirty".