203142420 has 72 divisors (see below), whose sum is σ = 663606216. Its totient is φ = 50003712.

The previous prime is 203142403. The next prime is 203142427. The reversal of 203142420 is 24241302.

203142420 is a `hidden beast` number, since 203 + 1 + 42 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11209104 + 191933316 = 3348^2 + 13854^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 203142393 and 203142402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203142427) 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 23 ways as a sum of consecutive naturals, for example, 41067 + ... + 45746.

It is an arithmetic number, because the mean of its divisors is an integer number (9216753).

Almost surely, 2^203142420 is an apocalyptic number.

203142420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203142420 is an abundant number, since it is smaller than the sum of its proper divisors (460463796).

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

203142420 is a wasteful number, since it uses less digits than its factorization.

203142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86841 (or 86836 counting only the distinct ones).

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

The square root of 203142420 is about 14252.8039346649. The cubic root of 203142420 is about 587.8504756551.

Adding to 203142420 its reverse (24241302), we get a palindrome (227383722).

The spelling of 203142420 in words is "two hundred three million, one hundred forty-two thousand, four hundred twenty".