20385472187 has 8 divisors (see below), whose sum is σ = 21071112192. Its totient is φ = 19701585000.

The previous prime is 20385472181. The next prime is 20385472223. The reversal of 20385472187 is 78127458302.

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

It is not a de Polignac number, because 20385472187 - 2³² = 16090504891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20385472181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414533 + ... + 461094.

It is an arithmetic number, because the mean of its divisors is an integer number (2633889024).

Almost surely, 2^20385472187 is an apocalyptic number.

20385472187 is a deficient number, since it is larger than the sum of its proper divisors (685640005).

20385472187 is an equidigital number, since it uses as much as digits as its factorization.

20385472187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876409.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 20385472187 in words is "twenty billion, three hundred eighty-five million, four hundred seventy-two thousand, one hundred eighty-seven".