21203333132 has 12 divisors (see below), whose sum is σ = 37136737176. Its totient is φ = 10592836800.

The previous prime is 21203333131. The next prime is 21203333143. The reversal of 21203333132 is 23133330212.

It is a junction number, because it is equal to n+sod(n) for n = 21203333098 and 21203333107.

It is not an unprimeable number, because it can be changed into a prime (21203333131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202038 + ... + 2211645.

It is an arithmetic number, because the mean of its divisors is an integer number (3094728098).

Almost surely, 2^21203333132 is an apocalyptic number.

It is an amenable number.

21203333132 is a deficient number, since it is larger than the sum of its proper divisors (15933404044).

21203333132 is a wasteful number, since it uses less digits than its factorization.

21203333132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414888 (or 4414886 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21203333132 its reverse (23133330212), we get a palindrome (44336663344).

The spelling of 21203333132 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand, one hundred thirty-two".