20384685 has 24 divisors (see below), whose sum is σ = 35469720. Its totient is φ = 10829952.

The previous prime is 20384681. The next prime is 20384687. The reversal of 20384685 is 58648302.

It can be written as a sum of positive squares in 4 ways, for example, as 910116 + 19474569 = 954^2 + 4413^2 .

It is not a de Polignac number, because 20384685 - 2² = 20384681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20384681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13551 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (1477905).

Almost surely, 2^20384685 is an apocalyptic number.

It is an amenable number.

20384685 is a deficient number, since it is larger than the sum of its proper divisors (15085035).

20384685 is a wasteful number, since it uses less digits than its factorization.

20384685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 20384685 is about 4514.9401989395. The cubic root of 20384685 is about 273.1710476605.

The spelling of 20384685 in words is "twenty million, three hundred eighty-four thousand, six hundred eighty-five".