21203031032 has 16 divisors (see below), whose sum is σ = 39758285760. Its totient is φ = 10600821504.

The previous prime is 21203031007. The next prime is 21203031049. The reversal of 21203031032 is 23013030212.

It is a self number, because there is not a number n which added to its sum of digits gives 21203031032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57128 + ... + 213704.

It is an arithmetic number, because the mean of its divisors is an integer number (2484892860).

Almost surely, 2^21203031032 is an apocalyptic number.

It is an amenable number.

21203031032 is a deficient number, since it is larger than the sum of its proper divisors (18555254728).

21203031032 is a wasteful number, since it uses less digits than its factorization.

21203031032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173510 (or 173506 counting only the distinct ones).

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

Adding to 21203031032 its reverse (23013030212), we get a palindrome (44216061244).

The spelling of 21203031032 in words is "twenty-one billion, two hundred three million, thirty-one thousand, thirty-two".