21321330032 has 10 divisors (see below), whose sum is σ = 41310076968. Its totient is φ = 10660665008.

The previous prime is 21321330007. The next prime is 21321330049. The reversal of 21321330032 is 23003312312.

It is a super-2 number, since 2×21321330032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21321329986 and 21321330013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666291548 + ... + 666291579.

Almost surely, 2^21321330032 is an apocalyptic number.

It is an amenable number.

21321330032 is a deficient number, since it is larger than the sum of its proper divisors (19988746936).

21321330032 is a wasteful number, since it uses less digits than its factorization.

21321330032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332583135 (or 1332583129 counting only the distinct ones).

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

Adding to 21321330032 its reverse (23003312312), we get a palindrome (44324642344).

The spelling of 21321330032 in words is "twenty-one billion, three hundred twenty-one million, three hundred thirty thousand, thirty-two".