21300403131244 has 24 divisors (see below), whose sum is σ = 37284227207136. Its totient is φ = 10647767088000.

The previous prime is 21300403131239. The next prime is 21300403131253. The reversal of 21300403131244 is 44213130400312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386823474 + ... + 386878534.

It is an arithmetic number, because the mean of its divisors is an integer number (1553509466964).

Almost surely, 2^{21300403131244} is an apocalyptic number.

It is an amenable number.

21300403131244 is a deficient number, since it is larger than the sum of its proper divisors (15983824075892).

21300403131244 is a wasteful number, since it uses less digits than its factorization.

21300403131244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75417 (or 75415 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21300403131244 its reverse (44213130400312), we get a palindrome (65513533531556).

The spelling of 21300403131244 in words is "twenty-one trillion, three hundred billion, four hundred three million, one hundred thirty-one thousand, two hundred forty-four".