20354353156363 has 4 divisors (see below), whose sum is σ = 20354390859168. Its totient is φ = 20354315453560.

The previous prime is 20354353156343. The next prime is 20354353156433. The reversal of 20354353156363 is 36365135345302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20354353156363 - 2¹⁷ = 20354353025291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20354353156343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18029668 + ... + 19125313.

It is an arithmetic number, because the mean of its divisors is an integer number (5088597714792).

Almost surely, 2^{20354353156363} is an apocalyptic number.

20354353156363 is a deficient number, since it is larger than the sum of its proper divisors (37702805).

20354353156363 is an equidigital number, since it uses as much as digits as its factorization.

20354353156363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37702804.

The product of its (nonzero) digits is 8748000, while the sum is 49.

The spelling of 20354353156363 in words is "twenty trillion, three hundred fifty-four billion, three hundred fifty-three million, one hundred fifty-six thousand, three hundred sixty-three".