20435040202 has 4 divisors (see below), whose sum is σ = 30652560306. Its totient is φ = 10217520100.

The previous prime is 20435040181. The next prime is 20435040209. The reversal of 20435040202 is 20204053402.

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., 20064439201 + 370601001 = 141649^2 + 19251^2 .

It is a Smith number, since the sum of its digits (22) 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 (20435040209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108760049 + ... + 5108760052.

Almost surely, 2^20435040202 is an apocalyptic number.

20435040202 is a deficient number, since it is larger than the sum of its proper divisors (10217520104).

20435040202 is a wasteful number, since it uses less digits than its factorization.

20435040202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217520103.

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20435040202 its reverse (20204053402), we get a palindrome (40639093604).

The spelling of 20435040202 in words is "twenty billion, four hundred thirty-five million, forty thousand, two hundred two".