20380293823 has 4 divisors (see below), whose sum is σ = 21037722688. Its totient is φ = 19722864960.

The previous prime is 20380293809. The next prime is 20380293833. The reversal of 20380293823 is 32839208302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20380293823 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 (20380293833) 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, 328714386 + ... + 328714447.

It is an arithmetic number, because the mean of its divisors is an integer number (5259430672).

Almost surely, 2^20380293823 is an apocalyptic number.

20380293823 is a deficient number, since it is larger than the sum of its proper divisors (657428865).

20380293823 is an equidigital number, since it uses as much as digits as its factorization.

20380293823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657428864.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 20380293823 in words is "twenty billion, three hundred eighty million, two hundred ninety-three thousand, eight hundred twenty-three".