21344442002 has 8 divisors (see below), whose sum is σ = 34479483276. Its totient is φ = 9851280912.

The previous prime is 21344441983. The next prime is 21344442017. The reversal of 21344442002 is 20024444312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18428334001 + 2916108001 = 135751^2 + 54001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 820940077 = 21344442002 / (2 + 1 + 3 + 4 + 4 + 4 + 4 + 2 + 0 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410470013 + ... + 410470064.

Almost surely, 2^21344442002 is an apocalyptic number.

21344442002 is a deficient number, since it is larger than the sum of its proper divisors (13135041274).

21344442002 is a wasteful number, since it uses less digits than its factorization.

21344442002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820940092.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21344442002 its reverse (20024444312), we get a palindrome (41368886314).

The spelling of 21344442002 in words is "twenty-one billion, three hundred forty-four million, four hundred forty-two thousand, two".