21534454025000 has 192 divisors, whose sum is σ = 57775424636160. Its totient is φ = 7370755200000.

The previous prime is 21534454024997. The next prime is 21534454025041. The reversal of 21534454025000 is 52045443512.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 103671245 + ... + 103878755.

It is an arithmetic number, because the mean of its divisors is an integer number (300913669980).

Almost surely, 2^{21534454025000} is an apocalyptic number.

21534454025000 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 21534454025000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28887712318080).

21534454025000 is an abundant number, since it is smaller than the sum of its proper divisors (36240970611160).

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

21534454025000 is an equidigital number, since it uses as much as digits as its factorization.

21534454025000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208142 (or 208118 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 21534454025000 its reverse (52045443512), we get a palindrome (21586499468512).

The spelling of 21534454025000 in words is "twenty-one trillion, five hundred thirty-four billion, four hundred fifty-four million, twenty-five thousand".