21453440140132 has 192 divisors, whose sum is σ = 53163083151360. Its totient is φ = 7295399654400.

The previous prime is 21453440140079. The next prime is 21453440140133. The reversal of 21453440140132 is 23104104435412.

It is not an unprimeable number, because it can be changed into a prime (21453440140133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39364963 + ... + 39906229.

It is an arithmetic number, because the mean of its divisors is an integer number (276891058080).

Almost surely, 2^{21453440140132} is an apocalyptic number.

21453440140132 is a gapful number since it is divisible by the number (22) 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 21453440140132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26581541575680).

21453440140132 is an abundant number, since it is smaller than the sum of its proper divisors (31709643011228).

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

21453440140132 is a wasteful number, since it uses less digits than its factorization.

21453440140132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541842 (or 541840 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21453440140132 its reverse (23104104435412), we get a palindrome (44557544575544).

The spelling of 21453440140132 in words is "twenty-one trillion, four hundred fifty-three billion, four hundred forty million, one hundred forty thousand, one hundred thirty-two".