21340510250000 has 280 divisors, whose sum is σ = 55730989759200. Its totient is φ = 7889616000000.

The previous prime is 21340510249991. The next prime is 21340510250023. The reversal of 21340510250000 is 5201504312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 194695211 + ... + 194804789.

It is an arithmetic number, because the mean of its divisors is an integer number (199039249140).

Almost surely, 2^{21340510250000} is an apocalyptic number.

21340510250000 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 21340510250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27865494879600).

21340510250000 is an abundant number, since it is smaller than the sum of its proper divisors (34390479509200).

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

21340510250000 is an equidigital number, since it uses as much as digits as its factorization.

21340510250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109677 (or 109646 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21340510250000 its reverse (5201504312), we get a palindrome (21345711754312).

The spelling of 21340510250000 in words is "twenty-one trillion, three hundred forty billion, five hundred ten million, two hundred fifty thousand".