21300236472 has 32 divisors (see below), whose sum is σ = 53589776400. Its totient is φ = 7054854144.

The previous prime is 21300236471. The next prime is 21300236509. The reversal of 21300236472 is 27463200312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300236471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2822697 + ... + 2830232.

Almost surely, 2^21300236472 is an apocalyptic number.

It is an amenable number.

21300236472 is an abundant number, since it is smaller than the sum of its proper divisors (32289539928).

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

21300236472 is a wasteful number, since it uses less digits than its factorization.

21300236472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653095 (or 5653091 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

Adding to 21300236472 its reverse (27463200312), we get a palindrome (48763436784).

The spelling of 21300236472 in words is "twenty-one billion, three hundred million, two hundred thirty-six thousand, four hundred seventy-two".