20123144011 has 8 divisors (see below), whose sum is σ = 20703268304. Its totient is φ = 19551248640.

The previous prime is 20123143991. The next prime is 20123144057. The reversal of 20123144011 is 11044132102.

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 20123144011 - 2⁹ = 20123143499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123144011.

It is not an unprimeable number, because it can be changed into a prime (20123144071) 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, 2052270 + ... + 2062051.

It is an arithmetic number, because the mean of its divisors is an integer number (2587908538).

Almost surely, 2^20123144011 is an apocalyptic number.

20123144011 is a deficient number, since it is larger than the sum of its proper divisors (580124293).

20123144011 is an equidigital number, since it uses as much as digits as its factorization.

20123144011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114461.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20123144011 its reverse (11044132102), we get a palindrome (31167276113).

The spelling of 20123144011 in words is "twenty billion, one hundred twenty-three million, one hundred forty-four thousand, eleven".