21041463104 has 56 divisors (see below), whose sum is σ = 42940300200. Its totient is φ = 10222626816.

The previous prime is 21041463103. The next prime is 21041463127. The reversal of 21041463104 is 40136414012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5052366400 + 15989096704 = 71080^2 + 126448^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041463103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881722 + ... + 1892870.

It is an arithmetic number, because the mean of its divisors is an integer number (766791075).

Almost surely, 2^21041463104 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 21041463104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21470150100).

21041463104 is an abundant number, since it is smaller than the sum of its proper divisors (21898837096).

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

21041463104 is a wasteful number, since it uses less digits than its factorization.

21041463104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11995 (or 11985 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21041463104 its reverse (40136414012), we get a palindrome (61177877116).

The spelling of 21041463104 in words is "twenty-one billion, forty-one million, four hundred sixty-three thousand, one hundred four".