21336313842 has 80 divisors (see below), whose sum is σ = 48696595200. Its totient is φ = 6980476320.

The previous prime is 21336313841. The next prime is 21336313861. The reversal of 21336313842 is 24831363312.

21336313842 is a `hidden beast` number, since 2 + 1 + 336 + 313 + 8 + 4 + 2 = 666.

It is a super-3 number, since 3×21336313842³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21336313797 and 21336313806.

It is not an unprimeable number, because it can be changed into a prime (21336313841) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7845759 + ... + 7848477.

It is an arithmetic number, because the mean of its divisors is an integer number (608707440).

Almost surely, 2^21336313842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21336313842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24348297600).

21336313842 is an abundant number, since it is smaller than the sum of its proper divisors (27360281358).

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

21336313842 is a wasteful number, since it uses less digits than its factorization.

21336313842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 3604 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The spelling of 21336313842 in words is "twenty-one billion, three hundred thirty-six million, three hundred thirteen thousand, eight hundred forty-two".