20130202 has 4 divisors (see below), whose sum is σ = 30195306. Its totient is φ = 10065100.

The previous prime is 20130197. The next prime is 20130203. The reversal of 20130202 is 20203102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20203102 = 2 ⋅10101551.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 5909761 = 3771^2 + 2431^2 .

It is not an unprimeable number, because it can be changed into a prime (20130203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032549 + ... + 5032552.

Almost surely, 2^20130202 is an apocalyptic number.

20130202 is a deficient number, since it is larger than the sum of its proper divisors (10065104).

20130202 is a wasteful number, since it uses less digits than its factorization.

20130202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10065103.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20130202 is about 4486.6693660220. The cubic root of 20130202 is about 272.0295257020.

Adding to 20130202 its reverse (20203102), we get a palindrome (40333304).

Subtracting 20130202 from its reverse (20203102), we obtain a square (72900 = 270²).

It can be divided in two parts, 201 and 30202, that added together give a palindrome (30403).

The spelling of 20130202 in words is "twenty million, one hundred thirty thousand, two hundred two".