21230326404144 has 240 divisors, whose sum is σ = 69810964458144. Its totient is φ = 5937853132800.

The previous prime is 21230326404143. The next prime is 21230326404193. The reversal of 21230326404144 is 44140462303212.

21230326404144 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 0 + 3 + 2 + 640 + 4 + 1 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21230326404099 and 21230326404108.

It is not an unprimeable number, because it can be changed into a prime (21230326404143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188999004 + ... + 189111300.

Almost surely, 2^{21230326404144} is an apocalyptic number.

21230326404144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21230326404144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34905482229072).

21230326404144 is an abundant number, since it is smaller than the sum of its proper divisors (48580638054000).

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

21230326404144 is a wasteful number, since it uses less digits than its factorization.

21230326404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121516 (or 121507 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 21230326404144 its reverse (44140462303212), we get a palindrome (65370788707356).

The spelling of 21230326404144 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-six million, four hundred four thousand, one hundred forty-four".