20354531263633 has 12 divisors (see below), whose sum is σ = 25070527103652. Its totient is φ = 16420462195200.

The previous prime is 20354531263621. The next prime is 20354531263637. The reversal of 20354531263633 is 33636213545302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10336147840144 + 10018383423489 = 3214988^2 + 3165183^2 .

It is not a de Polignac number, because 20354531263633 - 2¹⁷ = 20354531132561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20354531263637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12217604968 + ... + 12217606633.

It is an arithmetic number, because the mean of its divisors is an integer number (2089210591971).

Almost surely, 2^{20354531263633} is an apocalyptic number.

It is an amenable number.

20354531263633 is a deficient number, since it is larger than the sum of its proper divisors (4715995840019).

20354531263633 is a wasteful number, since it uses less digits than its factorization.

20354531263633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24435211632 (or 24435211625 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 46.

The spelling of 20354531263633 in words is "twenty trillion, three hundred fifty-four billion, five hundred thirty-one million, two hundred sixty-three thousand, six hundred thirty-three".