21653053204031 has 8 divisors (see below), whose sum is σ = 22238772274464. Its totient is φ = 21067360524000.

The previous prime is 21653053204001. The next prime is 21653053204049. The reversal of 21653053204031 is 13040235035612.

It is a happy number.

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 21653053204031 - 2¹⁰ = 21653053203007 is a prime.

It is a super-2 number, since 2×21653053204031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21653053203982 and 21653053204000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653053204001) 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, 4928795 + ... + 8221868.

It is an arithmetic number, because the mean of its divisors is an integer number (2779846534308).

Almost surely, 2^{21653053204031} is an apocalyptic number.

21653053204031 is a deficient number, since it is larger than the sum of its proper divisors (585719070433).

21653053204031 is a wasteful number, since it uses less digits than its factorization.

21653053204031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195201.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21653053204031 its reverse (13040235035612), we get a palindrome (34693288239643).

The spelling of 21653053204031 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-three million, two hundred four thousand, thirty-one".