20194679 has 4 divisors (see below), whose sum is σ = 20218584. Its totient is φ = 20170776.

The previous prime is 20194661. The next prime is 20194703. The reversal of 20194679 is 97649102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20194679 - 2¹⁶ = 20129143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194619) 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 3 ways as a sum of consecutive naturals, for example, 10637 + ... + 12390.

It is an arithmetic number, because the mean of its divisors is an integer number (5054646).

Almost surely, 2^20194679 is an apocalyptic number.

20194679 is a deficient number, since it is larger than the sum of its proper divisors (23905).

20194679 is an equidigital number, since it uses as much as digits as its factorization.

20194679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23904.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20194679 is about 4493.8490183806. The cubic root of 20194679 is about 272.3196528535.

The spelling of 20194679 in words is "twenty million, one hundred ninety-four thousand, six hundred seventy-nine".