21412106550 has 72 divisors (see below), whose sum is σ = 57549899160. Its totient is φ = 5707641600.

The previous prime is 21412106533. The next prime is 21412106557. The reversal of 21412106550 is 5560121412.

21412106550 is a `hidden beast` number, since 2 + 1 + 4 + 1 + 2 + 1 + 0 + 655 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412106557) 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 35 ways as a sum of consecutive naturals, for example, 1350670 + ... + 1366430.

It is an arithmetic number, because the mean of its divisors is an integer number (799304155).

Almost surely, 2^21412106550 is an apocalyptic number.

21412106550 is an abundant number, since it is smaller than the sum of its proper divisors (36137792610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21412106550 is a wasteful number, since it uses less digits than its factorization.

21412106550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18798 (or 18790 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 21412106550 its reverse (5560121412), we get a palindrome (26972227962).

The spelling of 21412106550 in words is "twenty-one billion, four hundred twelve million, one hundred six thousand, five hundred fifty".