21318348696 has 64 divisors (see below), whose sum is σ = 54475027200. Its totient is φ = 6950122368.

The previous prime is 21318348691. The next prime is 21318348697. The reversal of 21318348696 is 69684381312.

It is a super-2 number, since 2×21318348696² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21318348691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240741 + ... + 317163.

It is an arithmetic number, because the mean of its divisors is an integer number (851172300).

Almost surely, 2^21318348696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21318348696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27237513600).

21318348696 is an abundant number, since it is smaller than the sum of its proper divisors (33156678504).

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

21318348696 is a wasteful number, since it uses less digits than its factorization.

21318348696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76688 (or 76684 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The spelling of 21318348696 in words is "twenty-one billion, three hundred eighteen million, three hundred forty-eight thousand, six hundred ninety-six".