21473623524444 has 192 divisors, whose sum is σ = 62508501888000. Its totient is φ = 5586645012480.

The previous prime is 21473623524443. The next prime is 21473623524449. The reversal of 21473623524444 is 44442532637412.

It is a super-2 number, since 2×21473623524444² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21473623524443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25624182 + ... + 26448930.

It is an arithmetic number, because the mean of its divisors is an integer number (325565114000).

Almost surely, 2^{21473623524444} 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 21473623524444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31254250944000).

21473623524444 is an abundant number, since it is smaller than the sum of its proper divisors (41034878363556).

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

21473623524444 is a wasteful number, since it uses less digits than its factorization.

21473623524444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825100 (or 825098 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 51.

The spelling of 21473623524444 in words is "twenty-one trillion, four hundred seventy-three billion, six hundred twenty-three million, five hundred twenty-four thousand, four hundred forty-four".