20013355 has 4 divisors (see below), whose sum is σ = 24016032. Its totient is φ = 16010680.

The previous prime is 20013353. The next prime is 20013373. The reversal of 20013355 is 55331002.

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

It is not a de Polignac number, because 20013355 - 2¹ = 20013353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001331 + ... + 2001340.

It is an arithmetic number, because the mean of its divisors is an integer number (6004008).

Almost surely, 2^20013355 is an apocalyptic number.

20013355 is a deficient number, since it is larger than the sum of its proper divisors (4002677).

20013355 is an equidigital number, since it uses as much as digits as its factorization.

20013355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002676.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20013355 is about 4473.6288402146. The cubic root of 20013355 is about 271.5021666285.

Adding to 20013355 its reverse (55331002), we get a palindrome (75344357).

It can be divided in two parts, 2001 and 3355, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 20013355 in words is "twenty million, thirteen thousand, three hundred fifty-five".