21414203244 has 108 divisors (see below), whose sum is σ = 63085912344. Its totient is φ = 6106883328.

The previous prime is 21414203233. The next prime is 21414203257. The reversal of 21414203244 is 44230241412.

21414203244 is a `hidden beast` number, since 2 + 1 + 414 + 2 + 0 + 3 + 244 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 953812 + ... + 976004.

It is an arithmetic number, because the mean of its divisors is an integer number (584128818).

Almost surely, 2^21414203244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21414203244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31542956172).

21414203244 is an abundant number, since it is smaller than the sum of its proper divisors (41671709100).

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

21414203244 is a wasteful number, since it uses less digits than its factorization.

21414203244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22764 (or 22752 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21414203244 its reverse (44230241412), we get a palindrome (65644444656).

The spelling of 21414203244 in words is "twenty-one billion, four hundred fourteen million, two hundred three thousand, two hundred forty-four".