203142018 has 16 divisors (see below), whose sum is σ = 406669536. Its totient is φ = 67649760.

The previous prime is 203142011. The next prime is 203142029. The reversal of 203142018 is 810241302.

It is a super-2 number, since 2×203142018² = 82533358954224648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203141985 and 203142003.

It is not an unprimeable number, because it can be changed into a prime (203142011) 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, 8971 + ... + 22062.

It is an arithmetic number, because the mean of its divisors is an integer number (25416846).

Almost surely, 2^203142018 is an apocalyptic number.

203142018 is an abundant number, since it is smaller than the sum of its proper divisors (203527518).

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

203142018 is a wasteful number, since it uses less digits than its factorization.

203142018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32129.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 203142018 is about 14252.7898321697. The cubic root of 203142018 is about 587.8500878876.

The spelling of 203142018 in words is "two hundred three million, one hundred forty-two thousand, eighteen".