20354621511353 has 16 divisors (see below), whose sum is σ = 20745291454272. Its totient is φ = 19968138840000.

The previous prime is 20354621511347. The next prime is 20354621511403. The reversal of 20354621511353 is 35311512645302.

It is a cyclic number.

It is not a de Polignac number, because 20354621511353 - 2¹⁴ = 20354621494969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20354621511353.

It is not an unprimeable number, because it can be changed into a prime (20354621511053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7311263 + ... + 9703803.

It is an arithmetic number, because the mean of its divisors is an integer number (1296580715892).

Almost surely, 2^{20354621511353} is an apocalyptic number.

It is an amenable number.

20354621511353 is a deficient number, since it is larger than the sum of its proper divisors (390669942919).

20354621511353 is a wasteful number, since it uses less digits than its factorization.

20354621511353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393416.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 20354621511353 in words is "twenty trillion, three hundred fifty-four billion, six hundred twenty-one million, five hundred eleven thousand, three hundred fifty-three".