20384893 has 4 divisors (see below), whose sum is σ = 20474140. Its totient is φ = 20295648.

The previous prime is 20384879. The next prime is 20384899. The reversal of 20384893 is 39848302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13557124 + 6827769 = 3682^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 20384893 - 2⁹ = 20384381 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 (20384899) 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, 44280 + ... + 44737.

It is an arithmetic number, because the mean of its divisors is an integer number (5118535).

Almost surely, 2^20384893 is an apocalyptic number.

It is an amenable number.

20384893 is a deficient number, since it is larger than the sum of its proper divisors (89247).

20384893 is an equidigital number, since it uses as much as digits as its factorization.

20384893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89246.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20384893 is about 4514.9632335159. The cubic root of 20384893 is about 273.1719767793.

The spelling of 20384893 in words is "twenty million, three hundred eighty-four thousand, eight hundred ninety-three".