21513540335000 has 160 divisors (see below), whose sum is σ = 57744640800000. Its totient is φ = 7358461968000.

The previous prime is 21513540334991. The next prime is 21513540335117. The reversal of 21513540335000 is 53304531512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13931501 + ... + 15398499.

It is an arithmetic number, because the mean of its divisors is an integer number (360904005000).

Almost surely, 2^{21513540335000} is an apocalyptic number.

21513540335000 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 21513540335000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28872320400000).

21513540335000 is an abundant number, since it is smaller than the sum of its proper divisors (36231100465000).

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

21513540335000 is a wasteful number, since it uses less digits than its factorization.

21513540335000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467451 (or 1467432 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 21513540335000 its reverse (53304531512), we get a palindrome (21566844866512).

The spelling of 21513540335000 in words is "twenty-one trillion, five hundred thirteen billion, five hundred forty million, three hundred thirty-five thousand".