20100202 has 4 divisors (see below), whose sum is σ = 30150306. Its totient is φ = 10050100.

The previous prime is 20100191. The next prime is 20100203. The reversal of 20100202 is 20200102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14814801 + 5285401 = 3849^2 + 2299^2 .

It is not an unprimeable number, because it can be changed into a prime (20100203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025049 + ... + 5025052.

Almost surely, 2^20100202 is an apocalyptic number.

20100202 is a deficient number, since it is larger than the sum of its proper divisors (10050104).

20100202 is a wasteful number, since it uses less digits than its factorization.

20100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050103.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20100202 is about 4483.3248822721. The cubic root of 20100202 is about 271.8943234955.

Adding to 20100202 its reverse (20200102), we get a palindrome (40300304).

It can be divided in two parts, 20100 and 202, that added together give a palindrome (20302).

The spelling of 20100202 in words is "twenty million, one hundred thousand, two hundred two".