20140144 has 20 divisors (see below), whose sum is σ = 39573360. Its totient is φ = 9927680.

The previous prime is 20140097. The next prime is 20140151. The reversal of 20140144 is 44104102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7729 + ... + 10000.

It is an arithmetic number, because the mean of its divisors is an integer number (1978668).

Almost surely, 2^20140144 is an apocalyptic number.

It is an amenable number.

20140144 is a deficient number, since it is larger than the sum of its proper divisors (19433216).

20140144 is a wasteful number, since it uses less digits than its factorization.

20140144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17808 (or 17802 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20140144 is about 4487.7771780693. Note that the first 3 decimals coincide. The cubic root of 20140144 is about 272.0743020771.

Adding to 20140144 its reverse (44104102), we get a palindrome (64244246).

The spelling of 20140144 in words is "twenty million, one hundred forty thousand, one hundred forty-four".