21300312104 has 8 divisors (see below), whose sum is σ = 39938085210. Its totient is φ = 10650156048.

The previous prime is 21300312091. The next prime is 21300312119. The reversal of 21300312104 is 40121300312.

It can be written as a sum of positive squares in only one way, i.e., 21024420004 + 275892100 = 144998^2 + 16610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1331269499 + ... + 1331269514.

Almost surely, 2^21300312104 is an apocalyptic number.

It is an amenable number.

21300312104 is a deficient number, since it is larger than the sum of its proper divisors (18637773106).

21300312104 is a wasteful number, since it uses less digits than its factorization.

21300312104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662539019 (or 2662539015 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21300312104 its reverse (40121300312), we get a palindrome (61421612416).

The spelling of 21300312104 in words is "twenty-one billion, three hundred million, three hundred twelve thousand, one hundred four".