100203420 has 24 divisors (see below), whose sum is σ = 280569744. Its totient is φ = 26720896.

The previous prime is 100203407. The next prime is 100203427. The reversal of 100203420 is 24302001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100203396 and 100203405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203427) 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, 834969 + ... + 835088.

It is an arithmetic number, because the mean of its divisors is an integer number (11690406).

Almost surely, 2^100203420 is an apocalyptic number.

100203420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100203420 is an abundant number, since it is smaller than the sum of its proper divisors (180366324).

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

100203420 is a wasteful number, since it uses less digits than its factorization.

100203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670069 (or 1670067 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 100203420 is about 10010.1658327922. The cubic root of 100203420 is about 464.4734008606.

Adding to 100203420 its reverse (24302001), we get a palindrome (124505421).

The spelling of 100203420 in words is "one hundred million, two hundred three thousand, four hundred twenty".