20193986 has 8 divisors (see below), whose sum is σ = 30345744. Its totient is φ = 10078740.

The previous prime is 20193967. The next prime is 20193991. The reversal of 20193986 is 68939102.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7700 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (3793218).

Almost surely, 2^20193986 is an apocalyptic number.

20193986 is a deficient number, since it is larger than the sum of its proper divisors (10151758).

20193986 is a wasteful number, since it uses less digits than its factorization.

20193986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18256.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20193986 is about 4493.7719123249. The cubic root of 20193986 is about 272.3165378468.

The spelling of 20193986 in words is "twenty million, one hundred ninety-three thousand, nine hundred eighty-six".