20018202002 has 8 divisors (see below), whose sum is σ = 30364688700. Its totient is φ = 9896639104.

The previous prime is 20018201971. The next prime is 20018202013. The reversal of 20018202002 is 20020281002.

It can be written as a sum of positive squares in 2 ways, for example, as 15309360361 + 4708841641 = 123731^2 + 68621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20018202002² (a number of 21 digits) contains 22 as substring.

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, 56230727 + ... + 56231082.

Almost surely, 2^20018202002 is an apocalyptic number.

20018202002 is a deficient number, since it is larger than the sum of its proper divisors (10346486698).

20018202002 is a wasteful number, since it uses less digits than its factorization.

20018202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112461900.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20018202002 its reverse (20020281002), we get a palindrome (40038483004).

The spelling of 20018202002 in words is "twenty billion, eighteen million, two hundred two thousand, two".