21150045623244 has 12 divisors (see below), whose sum is σ = 49350106454264. Its totient is φ = 7050015207744.

The previous prime is 21150045623237. The next prime is 21150045623293. The reversal of 21150045623244 is 44232654005112.

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

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, 881251900957 + ... + 881251900980.

Almost surely, 2^{21150045623244} is an apocalyptic number.

It is an amenable number.

21150045623244 is an abundant number, since it is smaller than the sum of its proper divisors (28200060831020).

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

21150045623244 is a wasteful number, since it uses less digits than its factorization.

21150045623244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762503801944 (or 1762503801942 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 21150045623244 its reverse (44232654005112), we get a palindrome (65382699628356).

The spelling of 21150045623244 in words is "twenty-one trillion, one hundred fifty billion, forty-five million, six hundred twenty-three thousand, two hundred forty-four".