20140143 has 8 divisors (see below), whose sum is σ = 27508656. Its totient is φ = 13099200.

The previous prime is 20140097. The next prime is 20140151. The reversal of 20140143 is 34104102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20140143 - 2⁶ = 20140079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 81748 + ... + 81993.

It is an arithmetic number, because the mean of its divisors is an integer number (3438582).

Almost surely, 2^20140143 is an apocalyptic number.

20140143 is a deficient number, since it is larger than the sum of its proper divisors (7368513).

20140143 is a wasteful number, since it uses less digits than its factorization.

20140143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163785.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20140143 is about 4487.7770666556. Note that the first 3 decimals coincide. The cubic root of 20140143 is about 272.0742975741.

Adding to 20140143 its reverse (34104102), we get a palindrome (54244245).

The spelling of 20140143 in words is "twenty million, one hundred forty thousand, one hundred forty-three".