21416535653 has 8 divisors (see below), whose sum is σ = 22721233920. Its totient is φ = 20129588640.

The previous prime is 21416535649. The next prime is 21416535671. The reversal of 21416535653 is 35653561412.

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 21416535653 - 2² = 21416535649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21416535653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416535683) 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, 4435328 + ... + 4440153.

It is an arithmetic number, because the mean of its divisors is an integer number (2840154240).

Almost surely, 2^21416535653 is an apocalyptic number.

It is an amenable number.

21416535653 is a deficient number, since it is larger than the sum of its proper divisors (1304698267).

21416535653 is a wasteful number, since it uses less digits than its factorization.

21416535653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875627.

The product of its digits is 324000, while the sum is 41.

The spelling of 21416535653 in words is "twenty-one billion, four hundred sixteen million, five hundred thirty-five thousand, six hundred fifty-three".