21444311130 has 64 divisors (see below), whose sum is σ = 57450843648. Its totient is φ = 5077719360.

The previous prime is 21444311129. The next prime is 21444311131. The reversal of 21444311130 is 3111344412.

It is an interprime number because it is at equal distance from previous prime (21444311129) and next prime (21444311131).

It is a self number, because there is not a number n which added to its sum of digits gives 21444311130.

It is not an unprimeable number, because it can be changed into a prime (21444311131) 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, 741424 + ... + 769803.

It is an arithmetic number, because the mean of its divisors is an integer number (897669432).

Almost surely, 2^21444311130 is an apocalyptic number.

21444311130 is an abundant number, since it is smaller than the sum of its proper divisors (36006532518).

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

21444311130 is a wasteful number, since it uses less digits than its factorization.

21444311130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511291.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21444311130 its reverse (3111344412), we get a palindrome (24555655542).

It can be divided in two parts, 214 and 44311130, that added together give a palindrome (44311344).

The spelling of 21444311130 in words is "twenty-one billion, four hundred forty-four million, three hundred eleven thousand, one hundred thirty".