21444321202 has 16 divisors (see below), whose sum is σ = 33063445080. Its totient is φ = 10426753792.

The previous prime is 21444321187. The next prime is 21444321211. The reversal of 21444321202 is 20212344412.

It can be written as a sum of positive squares in 4 ways, for example, as 13975731961 + 7468589241 = 118219^2 + 86421^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883177 + ... + 907132.

Almost surely, 2^21444321202 is an apocalyptic number.

21444321202 is a deficient number, since it is larger than the sum of its proper divisors (11619123878).

21444321202 is a wasteful number, since it uses less digits than its factorization.

21444321202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790477.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21444321202 its reverse (20212344412), we get a palindrome (41656665614).

The spelling of 21444321202 in words is "twenty-one billion, four hundred forty-four million, three hundred twenty-one thousand, two hundred two".