21203103132 has 48 divisors (see below), whose sum is σ = 55180097280. Its totient is φ = 7040818224.

The previous prime is 21203103113. The next prime is 21203103133. The reversal of 21203103132 is 23130130212.

21203103132 is a `hidden beast` number, since 21 + 20 + 310 + 313 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203103133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344838 + ... + 401645.

It is an arithmetic number, because the mean of its divisors is an integer number (1149585360).

Almost surely, 2^21203103132 is an apocalyptic number.

It is an amenable number.

21203103132 is an abundant number, since it is smaller than the sum of its proper divisors (33976994148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203103132 is a wasteful number, since it uses less digits than its factorization.

21203103132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746759 (or 746751 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21203103132 its reverse (23130130212), we get a palindrome (44333233344).

The spelling of 21203103132 in words is "twenty-one billion, two hundred three million, one hundred three thousand, one hundred thirty-two".