21114220344 has 96 divisors (see below), whose sum is σ = 62901392400. Its totient is φ = 5885483520.

The previous prime is 21114220343. The next prime is 21114220381. The reversal of 21114220344 is 44302241112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114220343) 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 23 ways as a sum of consecutive naturals, for example, 170739 + ... + 267170.

Almost surely, 2^21114220344 is an apocalyptic number.

21114220344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21114220344 is an abundant number, since it is smaller than the sum of its proper divisors (41787172056).

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

21114220344 is a wasteful number, since it uses less digits than its factorization.

21114220344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437973 (or 437962 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21114220344 its reverse (44302241112), we get a palindrome (65416461456).

The spelling of 21114220344 in words is "twenty-one billion, one hundred fourteen million, two hundred twenty thousand, three hundred forty-four".