21143413044 has 192 divisors, whose sum is σ = 62914682880. Its totient is φ = 6089973120.

The previous prime is 21143413019. The next prime is 21143413051. The reversal of 21143413044 is 44031434112.

21143413044 is a `hidden beast` number, since 2 + 1 + 14 + 341 + 304 + 4 = 666.

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 = 21143412999 and 21143413017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1510759 + ... + 1524689.

It is an arithmetic number, because the mean of its divisors is an integer number (327680640).

Almost surely, 2^21143413044 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 21143413044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31457341440).

21143413044 is an abundant number, since it is smaller than the sum of its proper divisors (41771269836).

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

21143413044 is a wasteful number, since it uses less digits than its factorization.

21143413044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14027 (or 14019 counting only the distinct ones).

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

Adding to 21143413044 its reverse (44031434112), we get a palindrome (65174847156).

The spelling of 21143413044 in words is "twenty-one billion, one hundred forty-three million, four hundred thirteen thousand, forty-four".