21202341040 has 80 divisors (see below), whose sum is σ = 49869665280. Its totient is φ = 8382513920.

The previous prime is 21202341031. The next prime is 21202341047. The reversal of 21202341040 is 4014320212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 21202340999 and 21202341017.

It is not an unprimeable number, because it can be changed into a prime (21202341047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4097655 + ... + 4102825.

It is an arithmetic number, because the mean of its divisors is an integer number (623370816).

Almost surely, 2^21202341040 is an apocalyptic number.

21202341040 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 21202341040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24934832640).

21202341040 is an abundant number, since it is smaller than the sum of its proper divisors (28667324240).

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

21202341040 is a wasteful number, since it uses less digits than its factorization.

21202341040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5770 (or 5764 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202341040 its reverse (4014320212), we get a palindrome (25216661252).

The spelling of 21202341040 in words is "twenty-one billion, two hundred two million, three hundred forty-one thousand, forty".