21150036200144 has 20 divisors (see below), whose sum is σ = 41053940432100. Its totient is φ = 10555470927360.

The previous prime is 21150036200087. The next prime is 21150036200191. The reversal of 21150036200144 is 44100263005112.

It can be written as a sum of positive squares in 2 ways, for example, as 9156143431744 + 11993892768400 = 3025912^2 + 3463220^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221689369 + ... + 1221706680.

It is an arithmetic number, because the mean of its divisors is an integer number (2052697021605).

Almost surely, 2^{21150036200144} is an apocalyptic number.

It is an amenable number.

21150036200144 is a deficient number, since it is larger than the sum of its proper divisors (19903904231956).

21150036200144 is a wasteful number, since it uses less digits than its factorization.

21150036200144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443396598 (or 2443396592 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21150036200144 its reverse (44100263005112), we get a palindrome (65250299205256).

The spelling of 21150036200144 in words is "twenty-one trillion, one hundred fifty billion, thirty-six million, two hundred thousand, one hundred forty-four".