21653063163023 has 4 divisors (see below), whose sum is σ = 22792698066360. Its totient is φ = 20513428259688.

The previous prime is 21653063162989. The next prime is 21653063163031. The reversal of 21653063163023 is 32036136035612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21653063163023 - 2²² = 21653058968719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653063163223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569817451640 + ... + 569817451677.

It is an arithmetic number, because the mean of its divisors is an integer number (5698174516590).

Almost surely, 2^{21653063163023} is an apocalyptic number.

21653063163023 is a deficient number, since it is larger than the sum of its proper divisors (1139634903337).

21653063163023 is a wasteful number, since it uses less digits than its factorization.

21653063163023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139634903336.

The product of its (nonzero) digits is 349920, while the sum is 41.

Adding to 21653063163023 its reverse (32036136035612), we get a palindrome (53689199198635).

The spelling of 21653063163023 in words is "twenty-one trillion, six hundred fifty-three billion, sixty-three million, one hundred sixty-three thousand, twenty-three".