21234200244 has 12 divisors (see below), whose sum is σ = 49546467264. Its totient is φ = 7078066744.

The previous prime is 21234200227. The next prime is 21234200261. The reversal of 21234200244 is 44200243212.

It is an interprime number because it is at equal distance from previous prime (21234200227) and next prime (21234200261).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 884758332 + ... + 884758355.

It is an arithmetic number, because the mean of its divisors is an integer number (4128872272).

Almost surely, 2^21234200244 is an apocalyptic number.

It is an amenable number.

21234200244 is an abundant number, since it is smaller than the sum of its proper divisors (28312267020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234200244 is a wasteful number, since it uses less digits than its factorization.

21234200244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769516694 (or 1769516692 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21234200244 its reverse (44200243212), we get a palindrome (65434443456).

The spelling of 21234200244 in words is "twenty-one billion, two hundred thirty-four million, two hundred thousand, two hundred forty-four".