20055011 has 4 divisors (see below), whose sum is σ = 20926992. Its totient is φ = 19183032.

The previous prime is 20055001. The next prime is 20055017. The reversal of 20055011 is 11055002.

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 20055011 - 2¹⁸ = 19792867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055017) 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, 435956 + ... + 436001.

It is an arithmetic number, because the mean of its divisors is an integer number (5231748).

Almost surely, 2^20055011 is an apocalyptic number.

20055011 is a deficient number, since it is larger than the sum of its proper divisors (871981).

20055011 is an equidigital number, since it uses as much as digits as its factorization.

20055011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871980.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 20055011 is about 4478.2821483243. The cubic root of 20055011 is about 271.6904052090.

Subtracting from 20055011 its reverse (11055002), we obtain a palindrome (9000009).

It can be divided in two parts, 200550 and 11, that multiplied together give a triangular number (2206050 = T₂₁₀₀).

The spelling of 20055011 in words is "twenty million, fifty-five thousand, eleven".