206420231142 has 128 divisors (see below), whose sum is σ = 476633963520. Its totient is φ = 66164739840.

The previous prime is 206420231141. The next prime is 206420231153. The reversal of 206420231142 is 241132024602.

206420231142 is a `hidden beast` number, since 2 + 0 + 6 + 420 + 231 + 1 + 4 + 2 = 666.

206420231142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206420231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 199825458 + ... + 199826490.

It is an arithmetic number, because the mean of its divisors is an integer number (3723702840).

Almost surely, 2^206420231142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206420231142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238316981760).

206420231142 is an abundant number, since it is smaller than the sum of its proper divisors (270213732378).

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

206420231142 is a wasteful number, since it uses less digits than its factorization.

206420231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 206420231142 its reverse (241132024602), we get a palindrome (447552255744).

The spelling of 206420231142 in words is "two hundred six billion, four hundred twenty million, two hundred thirty-one thousand, one hundred forty-two".