20355001255163 has 4 divisors (see below), whose sum is σ = 20355255166848. Its totient is φ = 20354747343480.

The previous prime is 20355001255139. The next prime is 20355001255231. The reversal of 20355001255163 is 36155210055302.

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 20355001255163 - 2²⁶ = 20354934146299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355001255123) 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, 126835556 + ... + 126995937.

It is an arithmetic number, because the mean of its divisors is an integer number (5088813791712).

Almost surely, 2^{20355001255163} is an apocalyptic number.

20355001255163 is a deficient number, since it is larger than the sum of its proper divisors (253911685).

20355001255163 is an equidigital number, since it uses as much as digits as its factorization.

20355001255163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253911684.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 20355001255163 in words is "twenty trillion, three hundred fifty-five billion, one million, two hundred fifty-five thousand, one hundred sixty-three".