20000111 has 8 divisors (see below), whose sum is σ = 20742480. Its totient is φ = 19261312.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000111 is 11100002.

It is a happy number.

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 20000111 - 2² = 20000107 is a prime.

It is a Duffinian number.

20000111 is a modest number, since divided by 111 gives 20 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20000095 and 20000104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000161) 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, 16616 + ... + 17778.

It is an arithmetic number, because the mean of its divisors is an integer number (2592810).

Almost surely, 2^20000111 is an apocalyptic number.

20000111 is a deficient number, since it is larger than the sum of its proper divisors (742369).

20000111 is a wasteful number, since it uses less digits than its factorization.

20000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 20000111 is about 4472.1483651596. The cubic root of 20000111 is about 271.4422638258.

Adding to 20000111 its reverse (11100002), we get a palindrome (31100113).

Multiplying 20000111 by its reverse (11100002), we get a palindrome (222001272100222).

The spelling of 20000111 in words is "twenty million, one hundred eleven", and thus it is an aban number.