21302133132 has 24 divisors (see below), whose sum is σ = 56805688576. Its totient is φ = 6086323728.

The previous prime is 21302133091. The next prime is 21302133133. The reversal of 21302133132 is 23133120312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21302133099 and 21302133108.

It is not an unprimeable number, because it can be changed into a prime (21302133133) 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 7 ways as a sum of consecutive naturals, for example, 126798328 + ... + 126798495.

Almost surely, 2^21302133132 is an apocalyptic number.

It is an amenable number.

21302133132 is an abundant number, since it is smaller than the sum of its proper divisors (35503555444).

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

21302133132 is a wasteful number, since it uses less digits than its factorization.

21302133132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253596837 (or 253596835 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21302133132 its reverse (23133120312), we get a palindrome (44435253444).

The spelling of 21302133132 in words is "twenty-one billion, three hundred two million, one hundred thirty-three thousand, one hundred thirty-two".