203312342440020 has 48 divisors (see below), whose sum is σ = 621026791455168. Its totient is φ = 49287840591360.

The previous prime is 203312342440013. The next prime is 203312342440073. The reversal of 203312342440020 is 20044243213302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 203312342440020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154024501189 + ... + 154024502508.

It is an arithmetic number, because the mean of its divisors is an integer number (12938058155316).

Almost surely, 2^{203312342440020} is an apocalyptic number.

203312342440020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203312342440020 is an abundant number, since it is smaller than the sum of its proper divisors (417714449015148).

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

203312342440020 is a wasteful number, since it uses less digits than its factorization.

203312342440020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308049003720 (or 308049003718 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 203312342440020 its reverse (20044243213302), we get a palindrome (223356585653322).

The spelling of 203312342440020 in words is "two hundred three trillion, three hundred twelve billion, three hundred forty-two million, four hundred forty thousand, twenty".