21031032032 has 48 divisors (see below), whose sum is σ = 41821330320. Its totient is φ = 10409914368.

The previous prime is 21031032023. The next prime is 21031032047. The reversal of 21031032032 is 23023013012.

It is a self number, because there is not a number n which added to its sum of digits gives 21031032032.

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, 5812688 + ... + 5816304.

It is an arithmetic number, because the mean of its divisors is an integer number (871277715).

Almost surely, 2^21031032032 is an apocalyptic number.

It is an amenable number.

21031032032 is a deficient number, since it is larger than the sum of its proper divisors (20790298288).

21031032032 is a wasteful number, since it uses less digits than its factorization.

21031032032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403 (or 5395 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21031032032 its reverse (23023013012), we get a palindrome (44054045044).

The spelling of 21031032032 in words is "twenty-one billion, thirty-one million, thirty-two thousand, thirty-two".