203429920 has 48 divisors (see below), whose sum is σ = 483356160. Its totient is φ = 80905984.

The previous prime is 203429899. The next prime is 203429921. The reversal of 203429920 is 29924302.

It is not an unprimeable number, because it can be changed into a prime (203429921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25089 + ... + 32191.

It is an arithmetic number, because the mean of its divisors is an integer number (10069920).

Almost surely, 2^203429920 is an apocalyptic number.

203429920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203429920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241678080).

203429920 is an abundant number, since it is smaller than the sum of its proper divisors (279926240).

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

203429920 is a wasteful number, since it uses less digits than its factorization.

203429920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297 (or 7289 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 203429920 is about 14262.8861034505. The cubic root of 203429920 is about 588.1276659871.

The spelling of 203429920 in words is "two hundred three million, four hundred twenty-nine thousand, nine hundred twenty".