21041244052 has 12 divisors (see below), whose sum is σ = 36824058880. Its totient is φ = 10520084376.

The previous prime is 21041244041. The next prime is 21041244053. The reversal of 21041244052 is 25044214012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041244053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38802 + ... + 208777.

Almost surely, 2^21041244052 is an apocalyptic number.

It is an amenable number.

21041244052 is a deficient number, since it is larger than the sum of its proper divisors (15782814828).

21041244052 is a wasteful number, since it uses less digits than its factorization.

21041244052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268830 (or 268828 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21041244052 its reverse (25044214012), we get a palindrome (46085458064).

The spelling of 21041244052 in words is "twenty-one billion, forty-one million, two hundred forty-four thousand, fifty-two".