203313420 has 36 divisors (see below), whose sum is σ = 616717920. Its totient is φ = 54216864.

The previous prime is 203313419. The next prime is 203313479. The reversal of 203313420 is 24313302.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 203313393 and 203313402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 564580 + ... + 564939.

Almost surely, 2^203313420 is an apocalyptic number.

203313420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203313420 is an abundant number, since it is smaller than the sum of its proper divisors (413404500).

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

203313420 is a wasteful number, since it uses less digits than its factorization.

203313420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129534 (or 1129529 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203313420 is about 14258.8014924116. The cubic root of 203313420 is about 588.0153751359.

Adding to 203313420 its reverse (24313302), we get a palindrome (227626722).

The spelling of 203313420 in words is "two hundred three million, three hundred thirteen thousand, four hundred twenty".