21621353101633 has 8 divisors (see below), whose sum is σ = 21990941182080. Its totient is φ = 21253572298560.

The previous prime is 21621353101631. The next prime is 21621353101639. The reversal of 21621353101633 is 33610135312612.

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 21621353101633 - 2¹ = 21621353101631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21621353101592 and 21621353101601.

It is not an unprimeable number, because it can be changed into a prime (21621353101631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451795213 + ... + 451843066.

It is an arithmetic number, because the mean of its divisors is an integer number (2748867647760).

Almost surely, 2^{21621353101633} is an apocalyptic number.

It is an amenable number.

21621353101633 is a deficient number, since it is larger than the sum of its proper divisors (369588080447).

21621353101633 is an equidigital number, since it uses as much as digits as its factorization.

21621353101633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903638687.

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 21621353101633 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred fifty-three million, one hundred one thousand, six hundred thirty-three".