203404420100 has 36 divisors (see below), whose sum is σ = 504442963584. Its totient is φ = 69738658080.

The previous prime is 203404420069. The next prime is 203404420127. The reversal of 203404420100 is 1024404302.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145288172 + ... + 145289571.

It is an arithmetic number, because the mean of its divisors is an integer number (14012304544).

Almost surely, 2^203404420100 is an apocalyptic number.

203404420100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203404420100 is an abundant number, since it is smaller than the sum of its proper divisors (301038543484).

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

203404420100 is a wasteful number, since it uses less digits than its factorization.

203404420100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290577764 (or 290577757 counting only the distinct ones).

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

Adding to 203404420100 its reverse (1024404302), we get a palindrome (204428824402).

The spelling of 203404420100 in words is "two hundred three billion, four hundred four million, four hundred twenty thousand, one hundred".