203111420 has 24 divisors (see below), whose sum is σ = 427255584. Its totient is φ = 81107136.

The previous prime is 203111407. The next prime is 203111429. The reversal of 203111420 is 24111302.

It is a junction number, because it is equal to n+sod(n) for n = 203111395 and 203111404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203111429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3977 + ... + 20543.

It is an arithmetic number, because the mean of its divisors is an integer number (17802316).

Almost surely, 2^203111420 is an apocalyptic number.

203111420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203111420 is an abundant number, since it is smaller than the sum of its proper divisors (224144164).

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

203111420 is a wasteful number, since it uses less digits than its factorization.

203111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17189 (or 17187 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 203111420 is about 14251.7163878601. The cubic root of 203111420 is about 587.8205716895.

Adding to 203111420 its reverse (24111302), we get a palindrome (227222722).

The spelling of 203111420 in words is "two hundred three million, one hundred eleven thousand, four hundred twenty".