21653232343313 has 8 divisors (see below), whose sum is σ = 21690346192032. Its totient is φ = 21616119264096.

The previous prime is 21653232343297. The next prime is 21653232343321. The reversal of 21653232343313 is 31334323235612.

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 21653232343313 - 2⁴ = 21653232343297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21653232343513) 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, 111043406 + ... + 111238232.

It is an arithmetic number, because the mean of its divisors is an integer number (2711293274004).

Almost surely, 2^{21653232343313} is an apocalyptic number.

It is an amenable number.

21653232343313 is a deficient number, since it is larger than the sum of its proper divisors (37113848719).

21653232343313 is a wasteful number, since it uses less digits than its factorization.

21653232343313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384751.

The product of its digits is 699840, while the sum is 41.

Adding to 21653232343313 its reverse (31334323235612), we get a palindrome (52987555578925).

The spelling of 21653232343313 in words is "twenty-one trillion, six hundred fifty-three billion, two hundred thirty-two million, three hundred forty-three thousand, three hundred thirteen".