21203032132 has 12 divisors (see below), whose sum is σ = 37111399276. Its totient is φ = 10599775200.

The previous prime is 21203032127. The next prime is 21203032139. The reversal of 21203032132 is 23123030212.

It can be written as a sum of positive squares in 2 ways, for example, as 12889969156 + 8313062976 = 113534^2 + 91176^2 .

It is not an unprimeable number, because it can be changed into a prime (21203032139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 407619 + ... + 456682.

Almost surely, 2^21203032132 is an apocalyptic number.

It is an amenable number.

21203032132 is a deficient number, since it is larger than the sum of its proper divisors (15908367144).

21203032132 is a wasteful number, since it uses less digits than its factorization.

21203032132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870438 (or 870436 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21203032132 its reverse (23123030212), we get a palindrome (44326062344).

The spelling of 21203032132 in words is "twenty-one billion, two hundred three million, thirty-two thousand, one hundred thirty-two".