203442440386 has 4 divisors (see below), whose sum is σ = 305163660582. Its totient is φ = 101721220192.

The previous prime is 203442440347. The next prime is 203442440387. The reversal of 203442440386 is 683044244302.

It is a happy number.

203442440386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 139423826025 + 64018614361 = 373395^2 + 253019^2 .

It is a super-2 number, since 2×203442440386² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203442440387) 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 as a sum of consecutive naturals, namely, 50860610095 + ... + 50860610098.

Almost surely, 2^203442440386 is an apocalyptic number.

203442440386 is a deficient number, since it is larger than the sum of its proper divisors (101721220196).

203442440386 is a wasteful number, since it uses less digits than its factorization.

203442440386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101721220195.

The product of its (nonzero) digits is 442368, while the sum is 40.

Adding to 203442440386 its reverse (683044244302), we get a palindrome (886486684688).

The spelling of 203442440386 in words is "two hundred three billion, four hundred forty-two million, four hundred forty thousand, three hundred eighty-six".