21300001232 has 20 divisors (see below), whose sum is σ = 41284651140. Its totient is φ = 10645897728.

The previous prime is 21300001231. The next prime is 21300001237. The reversal of 21300001232 is 23210000312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15564059536 + 5735941696 = 124756^2 + 75736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300001231) 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, 213383 + ... + 296870.

It is an arithmetic number, because the mean of its divisors is an integer number (2064232557).

Almost surely, 2^21300001232 is an apocalyptic number.

It is an amenable number.

21300001232 is a deficient number, since it is larger than the sum of its proper divisors (19984649908).

21300001232 is a wasteful number, since it uses less digits than its factorization.

21300001232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512870 (or 512864 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21300001232 its reverse (23210000312), we get a palindrome (44510001544).

The spelling of 21300001232 in words is "twenty-one billion, three hundred million, one thousand, two hundred thirty-two".