21654425606 has 8 divisors (see below), whose sum is σ = 35434514664. Its totient is φ = 9842920720.

The previous prime is 21654425593. The next prime is 21654425627. The reversal of 21654425606 is 60652445612.

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

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, 492146015 + ... + 492146058.

It is an arithmetic number, because the mean of its divisors is an integer number (4429314333).

Almost surely, 2^21654425606 is an apocalyptic number.

21654425606 is a deficient number, since it is larger than the sum of its proper divisors (13780089058).

21654425606 is a wasteful number, since it uses less digits than its factorization.

21654425606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984292086.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 21654425606 in words is "twenty-one billion, six hundred fifty-four million, four hundred twenty-five thousand, six hundred six".