20678195 has 8 divisors (see below), whose sum is σ = 24839136. Its totient is φ = 16525696.

The previous prime is 20678191. The next prime is 20678197. The reversal of 20678195 is 59187602.

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

It is a cyclic number.

It is not a de Polignac number, because 20678195 - 2² = 20678191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20678191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434 + ... + 9096.

It is an arithmetic number, because the mean of its divisors is an integer number (3104892).

Almost surely, 2^20678195 is an apocalyptic number.

20678195 is a deficient number, since it is larger than the sum of its proper divisors (4160941).

20678195 is a wasteful number, since it uses less digits than its factorization.

20678195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 20678195 is about 4547.3283365071. The cubic root of 20678195 is about 274.4758943356.

The spelling of 20678195 in words is "twenty million, six hundred seventy-eight thousand, one hundred ninety-five".