21432001110 has 64 divisors (see below), whose sum is σ = 55464659712. Its totient is φ = 5268790656.

The previous prime is 21432001093. The next prime is 21432001117. The reversal of 21432001110 is 1110023412.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21432001110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432001117) 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, 272017 + ... + 341843.

It is an arithmetic number, because the mean of its divisors is an integer number (866635308).

Almost surely, 2^21432001110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21432001110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27732329856).

21432001110 is an abundant number, since it is smaller than the sum of its proper divisors (34032658602).

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

21432001110 is a wasteful number, since it uses less digits than its factorization.

21432001110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70637.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21432001110 its reverse (1110023412), we get a palindrome (22542024522).

The spelling of 21432001110 in words is "twenty-one billion, four hundred thirty-two million, one thousand, one hundred ten".