20388084 has 12 divisors (see below), whose sum is σ = 47572224. Its totient is φ = 6796024.

The previous prime is 20388079. The next prime is 20388107. The reversal of 20388084 is 48088302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849492 + ... + 849515.

It is an arithmetic number, because the mean of its divisors is an integer number (3964352).

Almost surely, 2^20388084 is an apocalyptic number.

It is an amenable number.

20388084 is an abundant number, since it is smaller than the sum of its proper divisors (27184140).

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

20388084 is a wasteful number, since it uses less digits than its factorization.

20388084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699014 (or 1699012 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 20388084 is about 4515.3166001954. The cubic root of 20388084 is about 273.1862299209.

The spelling of 20388084 in words is "twenty million, three hundred eighty-eight thousand, eighty-four".