20163355 has 4 divisors (see below), whose sum is σ = 24196032. Its totient is φ = 16130680.

The previous prime is 20163331. The next prime is 20163359. The reversal of 20163355 is 55336102.

It is a happy number.

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

It is not a de Polignac number, because 20163355 - 2¹⁷ = 20032283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20163359) 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, 2016331 + ... + 2016340.

It is an arithmetic number, because the mean of its divisors is an integer number (6049008).

Almost surely, 2^20163355 is an apocalyptic number.

20163355 is a deficient number, since it is larger than the sum of its proper divisors (4032677).

20163355 is an equidigital number, since it uses as much as digits as its factorization.

20163355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032676.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 20163355 is about 4490.3624575306. The cubic root of 20163355 is about 272.1787815051.

Adding to 20163355 its reverse (55336102), we get a palindrome (75499457).

The spelling of 20163355 in words is "twenty million, one hundred sixty-three thousand, three hundred fifty-five".