20385356 has 12 divisors (see below), whose sum is σ = 35889168. Its totient is φ = 10131312.

The previous prime is 20385349. The next prime is 20385359. The reversal of 20385356 is 65358302.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20385359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14591 + ... + 15926.

It is an arithmetic number, because the mean of its divisors is an integer number (2990764).

Almost surely, 2^20385356 is an apocalyptic number.

It is an amenable number.

20385356 is a deficient number, since it is larger than the sum of its proper divisors (15503812).

20385356 is a wasteful number, since it uses less digits than its factorization.

20385356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30688 (or 30686 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 20385356 is about 4515.0145071749. The cubic root of 20385356 is about 273.1740449394.

The spelling of 20385356 in words is "twenty million, three hundred eighty-five thousand, three hundred fifty-six".