21384968060 has 96 divisors (see below), whose sum is σ = 47615299200. Its totient is φ = 8051281920.

The previous prime is 21384968053. The next prime is 21384968069. The reversal of 21384968060 is 6086948312.

It is a junction number, because it is equal to n+sod(n) for n = 21384967996 and 21384968014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21384968069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9374120 + ... + 9376400.

It is an arithmetic number, because the mean of its divisors is an integer number (495992700).

Almost surely, 2^21384968060 is an apocalyptic number.

21384968060 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 21384968060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23807649600).

21384968060 is an abundant number, since it is smaller than the sum of its proper divisors (26230331140).

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

21384968060 is a wasteful number, since it uses less digits than its factorization.

21384968060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 21384968060 in words is "twenty-one billion, three hundred eighty-four million, nine hundred sixty-eight thousand, sixty".