100820002 has 4 divisors (see below), whose sum is σ = 151230006. Its totient is φ = 50410000.

The previous prime is 100819997. The next prime is 100820003. The reversal of 100820002 is 200028001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200028001 = 17 ⋅11766353.

It can be written as a sum of positive squares in only one way, i.e., 50424201 + 50395801 = 7101^2 + 7099^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (100820003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25204999 + ... + 25205002.

Almost surely, 2^100820002 is an apocalyptic number.

100820002 is a deficient number, since it is larger than the sum of its proper divisors (50410004).

100820002 is an equidigital number, since it uses as much as digits as its factorization.

100820002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50410003.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100820002 is about 10040.9163924415. The cubic root of 100820002 is about 465.4241353160.

Adding to 100820002 its reverse (200028001), we get a palindrome (300848003).

The spelling of 100820002 in words is "one hundred million, eight hundred twenty thousand, two".