20238375909 has 4 divisors (see below), whose sum is σ = 26984501216. Its totient is φ = 13492250604.

The previous prime is 20238375881. The next prime is 20238375919. The reversal of 20238375909 is 90957383202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20238375909 - 2¹¹ = 20238373861 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 (20238375919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3373062649 + ... + 3373062654.

It is an arithmetic number, because the mean of its divisors is an integer number (6746125304).

Almost surely, 2^20238375909 is an apocalyptic number.

It is an amenable number.

20238375909 is a deficient number, since it is larger than the sum of its proper divisors (6746125307).

20238375909 is an equidigital number, since it uses as much as digits as its factorization.

20238375909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746125306.

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 20238375909 in words is "twenty billion, two hundred thirty-eight million, three hundred seventy-five thousand, nine hundred nine".