21141500325440 has 112 divisors (see below), whose sum is σ = 54983498181120. Its totient is φ = 7678908948480.

The previous prime is 21141500325433. The next prime is 21141500325443. The reversal of 21141500325440 is 4452300514112.

It is a super-2 number, since 2×21141500325440² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 21141500325397 and 21141500325406.

It is not an unprimeable number, because it can be changed into a prime (21141500325443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442025 + ... + 6517544.

Almost surely, 2^{21141500325440} is an apocalyptic number.

21141500325440 is a gapful number since it is divisible by the number (20) 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 21141500325440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27491749090560).

21141500325440 is an abundant number, since it is smaller than the sum of its proper divisors (33841997855680).

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

21141500325440 is a wasteful number, since it uses less digits than its factorization.

21141500325440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960460 (or 6960450 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 21141500325440 its reverse (4452300514112), we get a palindrome (25593800839552).

The spelling of 21141500325440 in words is "twenty-one trillion, one hundred forty-one billion, five hundred million, three hundred twenty-five thousand, four hundred forty".