21444134103 has 128 divisors (see below), whose sum is σ = 38949120000. Its totient is φ = 11389289472.

The previous prime is 21444134081. The next prime is 21444134119. The reversal of 21444134103 is 30143144412.

21444134103 is a `hidden beast` number, since 2 + 144 + 413 + 4 + 103 = 666.

It is not a de Polignac number, because 21444134103 - 2¹⁰ = 21444133079 is a prime.

It is a super-2 number, since 2×21444134103² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444034103) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 73188025 + ... + 73188317.

It is an arithmetic number, because the mean of its divisors is an integer number (304290000).

Almost surely, 2^21444134103 is an apocalyptic number.

21444134103 is a deficient number, since it is larger than the sum of its proper divisors (17504985897).

21444134103 is a wasteful number, since it uses less digits than its factorization.

21444134103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21444134103 its reverse (30143144412), we get a palindrome (51587278515).

The spelling of 21444134103 in words is "twenty-one billion, four hundred forty-four million, one hundred thirty-four thousand, one hundred three".