21412026563 has 8 divisors (see below), whose sum is σ = 21639626400. Its totient is φ = 21184732800.

The previous prime is 21412026539. The next prime is 21412026583. The reversal of 21412026563 is 36562021412.

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 21412026563 - 2⁶ = 21412026499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412026533) 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, 65531 + ... + 217067.

It is an arithmetic number, because the mean of its divisors is an integer number (2704953300).

Almost surely, 2^21412026563 is an apocalyptic number.

21412026563 is a deficient number, since it is larger than the sum of its proper divisors (227599837).

21412026563 is a wasteful number, since it uses less digits than its factorization.

21412026563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153037.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21412026563 its reverse (36562021412), we get a palindrome (57974047975).

The spelling of 21412026563 in words is "twenty-one billion, four hundred twelve million, twenty-six thousand, five hundred sixty-three".