20100143 has 8 divisors (see below), whose sum is σ = 23440800. Its totient is φ = 17228400.

The previous prime is 20100097. The next prime is 20100149. The reversal of 20100143 is 34100102.

It is a happy number.

It is not a de Polignac number, because 20100143 - 2⁶ = 20100079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100149) 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, 28958 + ... + 29643.

It is an arithmetic number, because the mean of its divisors is an integer number (2930100).

Almost surely, 2^20100143 is an apocalyptic number.

20100143 is a deficient number, since it is larger than the sum of its proper divisors (3340657).

20100143 is an frugal number, since it uses more digits than its factorization.

20100143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58622 (or 58608 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20100143 is about 4483.3183023292. The cubic root of 20100143 is about 271.8940574654.

Adding to 20100143 its reverse (34100102), we get a palindrome (54200245).

The spelling of 20100143 in words is "twenty million, one hundred thousand, one hundred forty-three".