21202444214 has 32 divisors (see below), whose sum is σ = 38474853120. Its totient is φ = 8569384992.

The previous prime is 21202444187. The next prime is 21202444229. The reversal of 21202444214 is 41244420212.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 589784 + ... + 624699.

It is an arithmetic number, because the mean of its divisors is an integer number (1202339160).

Almost surely, 2^21202444214 is an apocalyptic number.

21202444214 is a deficient number, since it is larger than the sum of its proper divisors (17272408906).

21202444214 is a wasteful number, since it uses less digits than its factorization.

21202444214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214564.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 21202444214 its reverse (41244420212), we get a palindrome (62446864426).

The spelling of 21202444214 in words is "twenty-one billion, two hundred two million, four hundred forty-four thousand, two hundred fourteen".