20011222013 has 6 divisors (see below), whose sum is σ = 20919104094. Its totient is φ = 19141168376.

The previous prime is 20011222003. The next prime is 20011222073. The reversal of 20011222013 is 31022211002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16271043364 + 3740178649 = 127558^2 + 61157^2 .

It is not a de Polignac number, because 20011222013 - 2⁶ = 20011221949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011222003) 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 5 ways as a sum of consecutive naturals, for example, 18913670 + ... + 18914727.

It is an arithmetic number, because the mean of its divisors is an integer number (3486517349).

Almost surely, 2^20011222013 is an apocalyptic number.

20011222013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20011222013 is a deficient number, since it is larger than the sum of its proper divisors (907882081).

20011222013 is an equidigital number, since it uses as much as digits as its factorization.

20011222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37828443 (or 37828420 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20011222013 its reverse (31022211002), we get a palindrome (51033433015).

The spelling of 20011222013 in words is "twenty billion, eleven million, two hundred twenty-two thousand, thirteen".