21444342410 has 16 divisors (see below), whose sum is σ = 38795758056. Its totient is φ = 8534194368.

The previous prime is 21444342401. The next prime is 21444342421. The reversal of 21444342410 is 1424344412.

It can be written as a sum of positive squares in 4 ways, for example, as 20402408569 + 1041933841 = 142837^2 + 32279^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5440757 + ... + 5444696.

Almost surely, 2^21444342410 is an apocalyptic number.

21444342410 is a deficient number, since it is larger than the sum of its proper divisors (17351415646).

21444342410 is a wasteful number, since it uses less digits than its factorization.

21444342410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885657.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21444342410 its reverse (1424344412), we get a palindrome (22868686822).

The spelling of 21444342410 in words is "twenty-one billion, four hundred forty-four million, three hundred forty-two thousand, four hundred ten".