21152334366533 has 8 divisors (see below), whose sum is σ = 22021608384408. Its totient is φ = 20298722943744.

The previous prime is 21152334366481. The next prime is 21152334366571. The reversal of 21152334366533 is 33566343325112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14121526811044 + 7030807555489 = 3757862^2 + 2651567^2 .

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 21152334366533 - 2⁶ = 21152334366469 is a prime.

It is a super-2 number, since 2×21152334366533² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152334306533) 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, 3915646016 + ... + 3915651417.

It is an arithmetic number, because the mean of its divisors is an integer number (2752701048051).

Almost surely, 2^{21152334366533} is an apocalyptic number.

It is an amenable number.

21152334366533 is a deficient number, since it is larger than the sum of its proper divisors (869274017875).

21152334366533 is an equidigital number, since it uses as much as digits as its factorization.

21152334366533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7831297543.

The product of its digits is 3499200, while the sum is 47.

The spelling of 21152334366533 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-four million, three hundred sixty-six thousand, five hundred thirty-three".