100003031020 has 48 divisors (see below), whose sum is σ = 219399062400. Its totient is φ = 38239443200.

The previous prime is 100003030937. The next prime is 100003031021. The reversal of 100003031020 is 20130300001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100003030988 and 100003031006.

It is not an unprimeable number, because it can be changed into a prime (100003031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794980 + ... + 912139.

It is an arithmetic number, because the mean of its divisors is an integer number (4570813800).

Almost surely, 2^100003031020 is an apocalyptic number.

100003031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100003031020 is an abundant number, since it is smaller than the sum of its proper divisors (119396031380).

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

100003031020 is a wasteful number, since it uses less digits than its factorization.

100003031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707258 (or 1707256 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 100003031020 its reverse (20130300001), we get a palindrome (120133331021).

The spelling of 100003031020 in words is "one hundred billion, three million, thirty-one thousand, twenty".