21323031032 has 32 divisors (see below), whose sum is σ = 41123926800. Its totient is φ = 10357530624.

The previous prime is 21323031001. The next prime is 21323031077. The reversal of 21323031032 is 23013032312.

It is a junction number, because it is equal to n+sod(n) for n = 21323030995 and 21323031013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140408 + ... + 249720.

Almost surely, 2^21323031032 is an apocalyptic number.

It is an amenable number.

21323031032 is a deficient number, since it is larger than the sum of its proper divisors (19800895768).

21323031032 is a wasteful number, since it uses less digits than its factorization.

21323031032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110015 (or 110011 counting only the distinct ones).

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

Adding to 21323031032 its reverse (23013032312), we get a palindrome (44336063344).

The spelling of 21323031032 in words is "twenty-one billion, three hundred twenty-three million, thirty-one thousand, thirty-two".