203030018481 has 4 divisors (see below), whose sum is σ = 270706691312. Its totient is φ = 135353345652.

The previous prime is 203030018449. The next prime is 203030018497. The reversal of 203030018481 is 184810030302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 203030018481 - 2⁵ = 203030018449 is a prime.

It is a super-2 number, since 2×203030018481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203030718481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33838336411 + ... + 33838336416.

It is an arithmetic number, because the mean of its divisors is an integer number (67676672828).

Almost surely, 2^203030018481 is an apocalyptic number.

It is an amenable number.

203030018481 is a deficient number, since it is larger than the sum of its proper divisors (67676672831).

203030018481 is an equidigital number, since it uses as much as digits as its factorization.

203030018481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67676672830.

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 203030018481 its reverse (184810030302), we get a palindrome (387840048783).

The spelling of 203030018481 in words is "two hundred three billion, thirty million, eighteen thousand, four hundred eighty-one".