21412144044 has 48 divisors (see below), whose sum is σ = 57303715840. Its totient is φ = 6907142160.

The previous prime is 21412144021. The next prime is 21412144057. The reversal of 21412144044 is 44044121412.

It is a happy number.

21412144044 is a `hidden beast` number, since 2 + 1 + 41 + 214 + 404 + 4 = 666.

It is a super-2 number, since 2×21412144044² (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 junction number, because it is equal to n+sod(n) for n = 21412143999 and 21412144017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3194404 + ... + 3201099.

Almost surely, 2^21412144044 is an apocalyptic number.

It is an amenable number.

21412144044 is an abundant number, since it is smaller than the sum of its proper divisors (35891571796).

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

21412144044 is a wasteful number, since it uses less digits than its factorization.

21412144044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395547 (or 6395539 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 21412144044 its reverse (44044121412), we get a palindrome (65456265456).

The spelling of 21412144044 in words is "twenty-one billion, four hundred twelve million, one hundred forty-four thousand, forty-four".