21241645144 has 16 divisors (see below), whose sum is σ = 40016846520. Its totient is φ = 10570486080.

The previous prime is 21241645133. The next prime is 21241645181. The reversal of 21241645144 is 44154614212.

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, 6290269 + ... + 6293644.

Almost surely, 2^21241645144 is an apocalyptic number.

It is an amenable number.

21241645144 is a deficient number, since it is larger than the sum of its proper divisors (18775201376).

21241645144 is a wasteful number, since it uses less digits than its factorization.

21241645144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12584130 (or 12584126 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The spelling of 21241645144 in words is "twenty-one billion, two hundred forty-one million, six hundred forty-five thousand, one hundred forty-four".