21404041110 has 96 divisors (see below), whose sum is σ = 57087493632. Its totient is φ = 5561444160.

The previous prime is 21404041093. The next prime is 21404041159. The reversal of 21404041110 is 1114040412.

21404041110 is a `hidden beast` number, since 214 + 0 + 40 + 411 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 949065 + ... + 971355.

It is an arithmetic number, because the mean of its divisors is an integer number (594661392).

Almost surely, 2^21404041110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21404041110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28543746816).

21404041110 is an abundant number, since it is smaller than the sum of its proper divisors (35683452522).

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

21404041110 is a wasteful number, since it uses less digits than its factorization.

21404041110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22578 (or 22575 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21404041110 its reverse (1114040412), we get a palindrome (22518081522).

The spelling of 21404041110 in words is "twenty-one billion, four hundred four million, forty-one thousand, one hundred ten".