21041233244 has 24 divisors (see below), whose sum is σ = 38457525120. Its totient is φ = 10054188144.

The previous prime is 21041233237. The next prime is 21041233247. The reversal of 21041233244 is 44233214012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041233247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487 + ... + 205145.

It is an arithmetic number, because the mean of its divisors is an integer number (1602396880).

Almost surely, 2^21041233244 is an apocalyptic number.

It is an amenable number.

21041233244 is a deficient number, since it is larger than the sum of its proper divisors (17416291876).

21041233244 is a wasteful number, since it uses less digits than its factorization.

21041233244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204809 (or 204807 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21041233244 its reverse (44233214012), we get a palindrome (65274447256).

The spelling of 21041233244 in words is "twenty-one billion, forty-one million, two hundred thirty-three thousand, two hundred forty-four".