21654659063 has 8 divisors (see below), whose sum is σ = 21861154368. Its totient is φ = 21448424704.

The previous prime is 21654659029. The next prime is 21654659077. The reversal of 21654659063 is 36095645612.

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 21654659063 - 2³⁰ = 20580917239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21654658999 and 21654659017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21654659023) 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, 103595 + ... + 232467.

It is an arithmetic number, because the mean of its divisors is an integer number (2732644296).

Almost surely, 2^21654659063 is an apocalyptic number.

21654659063 is a deficient number, since it is larger than the sum of its proper divisors (206495305).

21654659063 is a wasteful number, since it uses less digits than its factorization.

21654659063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130473.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 21654659063 in words is "twenty-one billion, six hundred fifty-four million, six hundred fifty-nine thousand, sixty-three".