20242143 has 14 divisors (see below), whose sum is σ = 30350424. Its totient is φ = 13494276.

The previous prime is 20242129. The next prime is 20242169. The reversal of 20242143 is 34124202.

20242143 is a `hidden beast` number, since 202 + 421 + 43 = 666.

It is not a de Polignac number, because 20242143 - 2⁴ = 20242127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 13155 + ... + 14612.

Almost surely, 2^20242143 is an apocalyptic number.

20242143 is a deficient number, since it is larger than the sum of its proper divisors (10108281).

20242143 is an frugal number, since it uses more digits than its factorization.

20242143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27785 (or 27770 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20242143 is about 4499.1269153026. The cubic root of 20242143 is about 272.5328322251.

Adding to 20242143 its reverse (34124202), we get a palindrome (54366345).

The spelling of 20242143 in words is "twenty million, two hundred forty-two thousand, one hundred forty-three".