203438020 has 12 divisors (see below), whose sum is σ = 427219884. Its totient is φ = 81375200.

The previous prime is 203438017. The next prime is 203438021. The reversal of 203438020 is 20834302.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 124902976 = 8862^2 + 11176^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203437982 and 203438000.

It is not an unprimeable number, because it can be changed into a prime (203438021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5085931 + ... + 5085970.

It is an arithmetic number, because the mean of its divisors is an integer number (35601657).

Almost surely, 2^203438020 is an apocalyptic number.

203438020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203438020 is an abundant number, since it is smaller than the sum of its proper divisors (223781864).

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

203438020 is a wasteful number, since it uses less digits than its factorization.

203438020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10171910 (or 10171908 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 203438020 is about 14263.1700543743. The cubic root of 203438020 is about 588.1354717397.

The spelling of 203438020 in words is "two hundred three million, four hundred thirty-eight thousand, twenty".