20128286023 has 4 divisors (see below), whose sum is σ = 20138297128. Its totient is φ = 20118274920.

The previous prime is 20128286021. The next prime is 20128286039. The reversal of 20128286023 is 32068282102.

It is a happy number.

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 20128286023 - 2¹ = 20128286021 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 20128286023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20128286021) 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, 5002536 + ... + 5006557.

It is an arithmetic number, because the mean of its divisors is an integer number (5034574282).

Almost surely, 2^20128286023 is an apocalyptic number.

20128286023 is a deficient number, since it is larger than the sum of its proper divisors (10011105).

20128286023 is a wasteful number, since it uses less digits than its factorization.

20128286023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011104.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 20128286023 in words is "twenty billion, one hundred twenty-eight million, two hundred eighty-six thousand, twenty-three".