205003420 has 24 divisors (see below), whose sum is σ = 435960000. Its totient is φ = 80962752.

The previous prime is 205003399. The next prime is 205003423. The reversal of 205003420 is 24300502.

It is a junction number, because it is equal to n+sod(n) for n = 205003394 and 205003403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205003423) 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, 63295 + ... + 66454.

It is an arithmetic number, because the mean of its divisors is an integer number (18165000).

Almost surely, 2^205003420 is an apocalyptic number.

205003420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205003420 is an abundant number, since it is smaller than the sum of its proper divisors (230956580).

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

205003420 is a wasteful number, since it uses less digits than its factorization.

205003420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129837 (or 129835 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 205003420 is about 14317.9404943588. The cubic root of 205003420 is about 589.6401329350.

Adding to 205003420 its reverse (24300502), we get a palindrome (229303922).

The spelling of 205003420 in words is "two hundred five million, three thousand, four hundred twenty".