203403213402312 has 128 divisors (see below), whose sum is σ = 634129043880960. Its totient is φ = 52819919973120.

The previous prime is 203403213402283. The next prime is 203403213402427. The reversal of 203403213402312 is 213204312304302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 203403213402312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4503498 + ... + 20666105.

It is an arithmetic number, because the mean of its divisors is an integer number (4954133155320).

Almost surely, 2^{203403213402312} is an apocalyptic number.

203403213402312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203403213402312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317064521940480).

203403213402312 is an abundant number, since it is smaller than the sum of its proper divisors (430725830478648).

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

203403213402312 is a wasteful number, since it uses less digits than its factorization.

203403213402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25174003 (or 25173999 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 203403213402312 its reverse (213204312304302), we get a palindrome (416607525706614).

The spelling of 203403213402312 in words is "two hundred three trillion, four hundred three billion, two hundred thirteen million, four hundred two thousand, three hundred twelve".