20158630009 has 4 divisors (see below), whose sum is σ = 23038434304. Its totient is φ = 17278825716.

The previous prime is 20158630003. The next prime is 20158630021. The reversal of 20158630009 is 90003685102.

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 a cyclic number.

It is not a de Polignac number, because 20158630009 - 2³ = 20158630001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20158630001) 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, 1439902137 + ... + 1439902150.

It is an arithmetic number, because the mean of its divisors is an integer number (5759608576).

Almost surely, 2^20158630009 is an apocalyptic number.

It is an amenable number.

20158630009 is a deficient number, since it is larger than the sum of its proper divisors (2879804295).

20158630009 is an equidigital number, since it uses as much as digits as its factorization.

20158630009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879804294.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 20158630009 in words is "twenty billion, one hundred fifty-eight million, six hundred thirty thousand, nine".