100002020 has 12 divisors (see below), whose sum is σ = 210004284. Its totient is φ = 40000800.

The previous prime is 100002017. The next prime is 100002031. The reversal of 100002020 is 20200001.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 88209664 = 3434^2 + 9392^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 100001995 and 100002013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500031 + ... + 2500070.

It is an arithmetic number, because the mean of its divisors is an integer number (17500357).

Almost surely, 2^100002020 is an apocalyptic number.

100002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100002020 is an abundant number, since it is smaller than the sum of its proper divisors (110002264).

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

100002020 is a wasteful number, since it uses less digits than its factorization.

100002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000110 (or 5000108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 100002020 is about 10000.1009994900. The cubic root of 100002020 is about 464.1620086767.

Adding to 100002020 its reverse (20200001), we get a palindrome (120202021).

The spelling of 100002020 in words is "one hundred million, two thousand, twenty".