21630002543441 has 8 divisors (see below), whose sum is σ = 21766541771520. Its totient is φ = 21493510142832.

The previous prime is 21630002543389. The next prime is 21630002543453. The reversal of 21630002543441 is 14434520003612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21630002543441 - 2¹⁸ = 21630002281297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21630002543741) 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, 10779905 + ... + 12627998.

It is an arithmetic number, because the mean of its divisors is an integer number (2720817721440).

Almost surely, 2^{21630002543441} is an apocalyptic number.

It is an amenable number.

21630002543441 is a deficient number, since it is larger than the sum of its proper divisors (136539228079).

21630002543441 is a wasteful number, since it uses less digits than its factorization.

21630002543441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23413735.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 21630002543441 in words is "twenty-one trillion, six hundred thirty billion, two million, five hundred forty-three thousand, four hundred forty-one".