20807875906 has 8 divisors (see below), whose sum is σ = 31275383184. Its totient is φ = 10382748180.

The previous prime is 20807875889. The next prime is 20807875909. The reversal of 20807875906 is 60957870802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20807875909) 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, 10593660 + ... + 10595623.

It is an arithmetic number, because the mean of its divisors is an integer number (3909422898).

Almost surely, 2^20807875906 is an apocalyptic number.

20807875906 is a deficient number, since it is larger than the sum of its proper divisors (10467507278).

20807875906 is a wasteful number, since it uses less digits than its factorization.

20807875906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21189776.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 20807875906 in words is "twenty billion, eight hundred seven million, eight hundred seventy-five thousand, nine hundred six".