20842386 has 8 divisors (see below), whose sum is σ = 41684784. Its totient is φ = 6947460.

The previous prime is 20842361. The next prime is 20842397. The reversal of 20842386 is 68324802.

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

20842386 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1736860 + ... + 1736871.

It is an arithmetic number, because the mean of its divisors is an integer number (5210598).

Almost surely, 2^20842386 is an apocalyptic number.

20842386 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20842386 is a wasteful number, since it uses less digits than its factorization.

20842386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473736.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20842386 is about 4565.3462081205. The cubic root of 20842386 is about 275.2004532989.

The spelling of 20842386 in words is "twenty million, eight hundred forty-two thousand, three hundred eighty-six".