20011311103 has 8 divisors (see below), whose sum is σ = 22872783872. Its totient is φ = 17150516856.

The previous prime is 20011311101. The next prime is 20011311121. The reversal of 20011311103 is 30111311002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20011311103 - 2¹ = 20011311101 is a prime.

It is a super-2 number, since 2×20011311103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011311101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104775 + ... + 225832.

It is an arithmetic number, because the mean of its divisors is an integer number (2859097984).

Almost surely, 2^20011311103 is an apocalyptic number.

20011311103 is a deficient number, since it is larger than the sum of its proper divisors (2861472769).

20011311103 is an equidigital number, since it uses as much as digits as its factorization.

20011311103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339261.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20011311103 its reverse (30111311002), we get a palindrome (50122622105).

The spelling of 20011311103 in words is "twenty billion, eleven million, three hundred eleven thousand, one hundred three".