21412315144 has 32 divisors (see below), whose sum is σ = 43839311040. Its totient is φ = 9723672000.

The previous prime is 21412315139. The next prime is 21412315159. The reversal of 21412315144 is 44151321412.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20907 + ... + 207994.

It is an arithmetic number, because the mean of its divisors is an integer number (1369978470).

Almost surely, 2^21412315144 is an apocalyptic number.

It is an amenable number.

21412315144 is an abundant number, since it is smaller than the sum of its proper divisors (22426995896).

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

21412315144 is a wasteful number, since it uses less digits than its factorization.

21412315144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229981 (or 229977 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

Adding to 21412315144 its reverse (44151321412), we get a palindrome (65563636556).

The spelling of 21412315144 in words is "twenty-one billion, four hundred twelve million, three hundred fifteen thousand, one hundred forty-four".