21412036366 has 20 divisors (see below), whose sum is σ = 37468842552. Its totient is φ = 9176584956.

The previous prime is 21412036363. The next prime is 21412036379. The reversal of 21412036366 is 66363021412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412036361) 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 9 ways as a sum of consecutive naturals, for example, 2224690 + ... + 2234293.

Almost surely, 2^21412036366 is an apocalyptic number.

21412036366 is a deficient number, since it is larger than the sum of its proper divisors (16056806186).

21412036366 is an frugal number, since it uses more digits than its factorization.

21412036366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459013 (or 4458992 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21412036366 its reverse (66363021412), we get a palindrome (87775057778).

The spelling of 21412036366 in words is "twenty-one billion, four hundred twelve million, thirty-six thousand, three hundred sixty-six".