20111111006 has 16 divisors (see below), whose sum is σ = 34492064640. Its totient is φ = 8615079000.

The previous prime is 20111111003. The next prime is 20111111021. The reversal of 20111111006 is 60011111102.

It is a super-3 number, since 3×20111111006³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111111003) 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, 299120 + ... + 360131.

It is an arithmetic number, because the mean of its divisors is an integer number (2155754040).

Almost surely, 2^20111111006 is an apocalyptic number.

20111111006 is a deficient number, since it is larger than the sum of its proper divisors (14380953634).

20111111006 is a wasteful number, since it uses less digits than its factorization.

20111111006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661439.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20111111006 its reverse (60011111102), we get a palindrome (80122222108).

The spelling of 20111111006 in words is "twenty billion, one hundred eleven million, one hundred eleven thousand, six".