203420210420 has 24 divisors (see below), whose sum is σ = 488208505344. Its totient is φ = 69744072096.

The previous prime is 203420210353. The next prime is 203420210453. The reversal of 203420210420 is 24012024302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 203420210392 and 203420210401.

It is a congruent number.

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, 726500612 + ... + 726500891.

It is an arithmetic number, because the mean of its divisors is an integer number (20342021056).

Almost surely, 2^203420210420 is an apocalyptic number.

203420210420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203420210420 is an abundant number, since it is smaller than the sum of its proper divisors (284788294924).

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

203420210420 is a wasteful number, since it uses less digits than its factorization.

203420210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453001519 (or 1453001517 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 203420210420 its reverse (24012024302), we get a palindrome (227432234722).

The spelling of 203420210420 in words is "two hundred three billion, four hundred twenty million, two hundred ten thousand, four hundred twenty".