20012442011 has 4 divisors (see below), whose sum is σ = 20237301000. Its totient is φ = 19787583024.

The previous prime is 20012441971. The next prime is 20012442019. The reversal of 20012442011 is 11024421002.

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 20012442011 - 2⁶ = 20012441947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012442019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112429361 + ... + 112429538.

It is an arithmetic number, because the mean of its divisors is an integer number (5059325250).

Almost surely, 2^20012442011 is an apocalyptic number.

20012442011 is a deficient number, since it is larger than the sum of its proper divisors (224858989).

20012442011 is an equidigital number, since it uses as much as digits as its factorization.

20012442011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224858988.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20012442011 its reverse (11024421002), we get a palindrome (31036863013).

The spelling of 20012442011 in words is "twenty billion, twelve million, four hundred forty-two thousand, eleven".