21341105400 has 192 divisors, whose sum is σ = 67024281600. Its totient is φ = 5616898560.

The previous prime is 21341105371. The next prime is 21341105413. The reversal of 21341105400 is 450114312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17449189 + ... + 17450411.

It is an arithmetic number, because the mean of its divisors is an integer number (349084800).

Almost surely, 2^21341105400 is an apocalyptic number.

21341105400 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 21341105400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33512140800).

21341105400 is an abundant number, since it is smaller than the sum of its proper divisors (45683176200).

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

21341105400 is a wasteful number, since it uses less digits than its factorization.

21341105400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21341105400 its reverse (450114312), we get a palindrome (21791219712).

The spelling of 21341105400 in words is "twenty-one billion, three hundred forty-one million, one hundred five thousand, four hundred".