21241214544 has 40 divisors (see below), whose sum is σ = 59861606112. Its totient is φ = 6436731520.

The previous prime is 21241214531. The next prime is 21241214569. The reversal of 21241214544 is 44541214212.

It is a congruent 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, 20114259 + ... + 20115314.

Almost surely, 2^21241214544 is an apocalyptic number.

21241214544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21241214544 is an abundant number, since it is smaller than the sum of its proper divisors (38620391568).

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

21241214544 is a wasteful number, since it uses less digits than its factorization.

21241214544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40229595 (or 40229589 counting only the distinct ones).

The product of its digits is 10240, while the sum is 30.

Adding to 21241214544 its reverse (44541214212), we get a palindrome (65782428756).

The spelling of 21241214544 in words is "twenty-one billion, two hundred forty-one million, two hundred fourteen thousand, five hundred forty-four".