20123143001 has 4 divisors (see below), whose sum is σ = 21671077092. Its totient is φ = 18575208912.

The previous prime is 20123142997. The next prime is 20123143021. The reversal of 20123143001 is 10034132102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10034132102 = 2 ⋅5017066051.

It can be written as a sum of positive squares in 2 ways, for example, as 12421325401 + 7701817600 = 111451^2 + 87760^2 .

It is not a de Polignac number, because 20123143001 - 2² = 20123142997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123143021) 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, 773967026 + ... + 773967051.

It is an arithmetic number, because the mean of its divisors is an integer number (5417769273).

Almost surely, 2^20123143001 is an apocalyptic number.

It is an amenable number.

20123143001 is a deficient number, since it is larger than the sum of its proper divisors (1547934091).

20123143001 is a wasteful number, since it uses less digits than its factorization.

20123143001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547934090.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123143001 its reverse (10034132102), we get a palindrome (30157275103).

The spelling of 20123143001 in words is "twenty billion, one hundred twenty-three million, one hundred forty-three thousand, one".