203431113220 has 24 divisors (see below), whose sum is σ = 427283144064. Its totient is φ = 81357625056.

The previous prime is 203431113211. The next prime is 203431113247. The reversal of 203431113220 is 22311134302.

It is a junction number, because it is equal to n+sod(n) for n = 203431113191 and 203431113200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813372 + ... + 1033651.

It is an arithmetic number, because the mean of its divisors is an integer number (17803464336).

Almost surely, 2^203431113220 is an apocalyptic number.

203431113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203431113220 is an abundant number, since it is smaller than the sum of its proper divisors (223852030844).

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

203431113220 is a wasteful number, since it uses less digits than its factorization.

203431113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852539 (or 1852537 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 203431113220 its reverse (22311134302), we get a palindrome (225742247522).

The spelling of 203431113220 in words is "two hundred three billion, four hundred thirty-one million, one hundred thirteen thousand, two hundred twenty".