21400110424 has 128 divisors (see below), whose sum is σ = 51358924800. Its totient is φ = 8118311040.

The previous prime is 21400110401. The next prime is 21400110427. The reversal of 21400110424 is 42401100412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400110427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3886057 + ... + 3891559.

It is an arithmetic number, because the mean of its divisors is an integer number (401241600).

Almost surely, 2^21400110424 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 21400110424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25679462400).

21400110424 is an abundant number, since it is smaller than the sum of its proper divisors (29958814376).

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

21400110424 is a wasteful number, since it uses less digits than its factorization.

21400110424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693 (or 5689 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21400110424 its reverse (42401100412), we get a palindrome (63801210836).

The spelling of 21400110424 in words is "twenty-one billion, four hundred million, one hundred ten thousand, four hundred twenty-four".