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20032144 = 2411113819
BaseRepresentation
bin100110001101…
…0101010010000
31101200201221021
41030122222100
520112012034
61553205224
7332161516
oct114325220
941621837
1020032144
11103424a0
126860814
1341c4c52
1429364b6
151b5a6b4
hex131aa90

20032144 has 20 divisors (see below), whose sum is σ = 42341040. Its totient is φ = 9105440.

The previous prime is 20032141. The next prime is 20032163. The reversal of 20032144 is 44123002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20032141) 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, 56734 + ... + 57085.

It is an arithmetic number, because the mean of its divisors is an integer number (2117052).

Almost surely, 220032144 is an apocalyptic number.

It is an amenable number.

20032144 is an abundant number, since it is smaller than the sum of its proper divisors (22308896).

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

20032144 is a wasteful number, since it uses less digits than its factorization.

20032144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113838 (or 113832 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20032144 is about 4475.7283206200. The cubic root of 20032144 is about 271.5871042222.

Adding to 20032144 its reverse (44123002), we get a palindrome (64155146).

The spelling of 20032144 in words is "twenty million, thirty-two thousand, one hundred forty-four".

Divisors: 1 2 4 8 11 16 22 44 88 176 113819 227638 455276 910552 1252009 1821104 2504018 5008036 10016072 20032144