21444423002 has 8 divisors (see below), whose sum is σ = 32170772916. Its totient is φ = 10720832032.

The previous prime is 21444422971. The next prime is 21444423019. The reversal of 21444423002 is 20032444412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16299373561 + 5145049441 = 127669^2 + 71729^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670193 + ... + 701460.

Almost surely, 2^21444423002 is an apocalyptic number.

21444423002 is a deficient number, since it is larger than the sum of its proper divisors (10726349914).

21444423002 is a wasteful number, since it uses less digits than its factorization.

21444423002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379472.

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

Adding to 21444423002 its reverse (20032444412), we get a palindrome (41476867414).

The spelling of 21444423002 in words is "twenty-one billion, four hundred forty-four million, four hundred twenty-three thousand, two".