20086778 has 8 divisors (see below), whose sum is σ = 30273600. Its totient is φ = 9995580.

The previous prime is 20086771. The next prime is 20086811. The reversal of 20086778 is 87768002.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20086771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23378 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (3784200).

Almost surely, 2^20086778 is an apocalyptic number.

20086778 is a deficient number, since it is larger than the sum of its proper divisors (10186822).

20086778 is a wasteful number, since it uses less digits than its factorization.

20086778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47812.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 20086778 is about 4481.8275290332. The cubic root of 20086778 is about 271.8337814467.

The spelling of 20086778 in words is "twenty million, eighty-six thousand, seven hundred seventy-eight".