20186144 has 24 divisors (see below), whose sum is σ = 43355088. Its totient is φ = 9175360.

The previous prime is 20186143. The next prime is 20186161. The reversal of 20186144 is 44168102.

It is not an unprimeable number, because it can be changed into a prime (20186141) 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, 28322 + ... + 29025.

It is an arithmetic number, because the mean of its divisors is an integer number (1806462).

Almost surely, 2^20186144 is an apocalyptic number.

It is an amenable number.

20186144 is an abundant number, since it is smaller than the sum of its proper divisors (23168944).

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

20186144 is a wasteful number, since it uses less digits than its factorization.

20186144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57368 (or 57360 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20186144 is about 4492.8992866522. The cubic root of 20186144 is about 272.2812834105.

The spelling of 20186144 in words is "twenty million, one hundred eighty-six thousand, one hundred forty-four".