21110410404 has 96 divisors (see below), whose sum is σ = 55602247680. Its totient is φ = 6925111200.

The previous prime is 21110410369. The next prime is 21110410439. The reversal of 21110410404 is 40401401112.

21110410404 is a `hidden beast` number, since 211 + 1 + 0 + 410 + 40 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21110410369) and next prime (21110410439).

It is a super-2 number, since 2×21110410404² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4836327 + ... + 4840689.

It is an arithmetic number, because the mean of its divisors is an integer number (579190080).

Almost surely, 2^21110410404 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 21110410404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27801123840).

21110410404 is an abundant number, since it is smaller than the sum of its proper divisors (34491837276).

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

21110410404 is a wasteful number, since it uses less digits than its factorization.

21110410404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078 (or 5070 counting only the distinct ones).

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

Adding to 21110410404 its reverse (40401401112), we get a palindrome (61511811516).

The spelling of 21110410404 in words is "twenty-one billion, one hundred ten million, four hundred ten thousand, four hundred four".