21404110332 has 96 divisors (see below), whose sum is σ = 56462321664. Its totient is φ = 6252134400.

The previous prime is 21404110331. The next prime is 21404110349. The reversal of 21404110332 is 23301140412.

It is a junction number, because it is equal to n+sod(n) for n = 21404110299 and 21404110308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404110331) 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, 1041468 + ... + 1061820.

It is an arithmetic number, because the mean of its divisors is an integer number (588149184).

Almost surely, 2^21404110332 is an apocalyptic number.

21404110332 is a gapful number since it is divisible by the number (22) 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 21404110332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28231160832).

21404110332 is an abundant number, since it is smaller than the sum of its proper divisors (35058211332).

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

21404110332 is a wasteful number, since it uses less digits than its factorization.

21404110332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20659 (or 20657 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21404110332 its reverse (23301140412), we get a palindrome (44705250744).

The spelling of 21404110332 in words is "twenty-one billion, four hundred four million, one hundred ten thousand, three hundred thirty-two".