20011120993 has 4 divisors (see below), whose sum is σ = 20013709828. Its totient is φ = 20008532160.

The previous prime is 20011120979. The next prime is 20011120999. The reversal of 20011120993 is 39902111002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19090119889 + 921001104 = 138167^2 + 30348^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011120993 - 2³³ = 11421186401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011120999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282788 + ... + 1298293.

It is an arithmetic number, because the mean of its divisors is an integer number (5003427457).

Almost surely, 2^20011120993 is an apocalyptic number.

It is an amenable number.

20011120993 is a deficient number, since it is larger than the sum of its proper divisors (2588835).

20011120993 is an equidigital number, since it uses as much as digits as its factorization.

20011120993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588834.

The product of its (nonzero) digits is 972, while the sum is 28.

Adding to 20011120993 its reverse (39902111002), we get a palindrome (59913231995).

The spelling of 20011120993 in words is "twenty billion, eleven million, one hundred twenty thousand, nine hundred ninety-three".