21342131400232 has 16 divisors (see below), whose sum is σ = 40016551690260. Its totient is φ = 10671050949504.

The previous prime is 21342131400211. The next prime is 21342131400241. The reversal of 21342131400232 is 23200413124312.

It can be written as a sum of positive squares in 2 ways, for example, as 19304300919556 + 2037830480676 = 4393666^2 + 1427526^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21342131400232.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6556698 + ... + 9256054.

Almost surely, 2^{21342131400232} is an apocalyptic number.

It is an amenable number.

21342131400232 is a deficient number, since it is larger than the sum of its proper divisors (18674420290028).

21342131400232 is a wasteful number, since it uses less digits than its factorization.

21342131400232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687660 (or 3687656 counting only the distinct ones).

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

Adding to 21342131400232 its reverse (23200413124312), we get a palindrome (44542544524544).

The spelling of 21342131400232 in words is "twenty-one trillion, three hundred forty-two billion, one hundred thirty-one million, four hundred thousand, two hundred thirty-two".