20386164 has 24 divisors (see below), whose sum is σ = 50071840.
Its totient is φ = 6437664.
The previous prime is 20386153. The next prime is 20386169. The reversal of 20386164 is 46168302.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20386169) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44479 + ... + 44934.
Almost surely, 220386164 is an apocalyptic number.
It is an amenable number.
20386164 is an abundant number, since it is smaller than the sum of its proper divisors (29685676).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20386164 is a wasteful number, since it uses less digits than its factorization.
20386164 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 89439 (or 89437 counting only the distinct ones).
The product of its (nonzero) digits is 6912, while the sum is 30.
The square root of 20386164 is about 4515.1039855135.
The cubic root of 20386164 is about 273.1776540942.
The spelling of 20386164 in words is "twenty million, three hundred eighty-six thousand, one hundred sixty-four".