20740111 has 4 divisors (see below), whose sum is σ = 23702992. Its totient is φ = 17777232.

The previous prime is 20740099. The next prime is 20740127. The reversal of 20740111 is 11104702.

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 20740111 - 2⁵ = 20740079 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 (20744111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481430 + ... + 1481443.

It is an arithmetic number, because the mean of its divisors is an integer number (5925748).

Almost surely, 2^20740111 is an apocalyptic number.

20740111 is a deficient number, since it is larger than the sum of its proper divisors (2962881).

20740111 is an equidigital number, since it uses as much as digits as its factorization.

20740111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962880.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 20740111 is about 4554.1312014478. The cubic root of 20740111 is about 274.7495725697.

Adding to 20740111 its reverse (11104702), we get a palindrome (31844813).

The spelling of 20740111 in words is "twenty million, seven hundred forty thousand, one hundred eleven".