20311230202 has 4 divisors (see below), whose sum is σ = 30466845306. Its totient is φ = 10155615100.

The previous prime is 20311230193. The next prime is 20311230259. The reversal of 20311230202 is 20203211302.

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., 14172664401 + 6138565801 = 119049^2 + 78349^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077807549 + ... + 5077807552.

Almost surely, 2^20311230202 is an apocalyptic number.

20311230202 is a deficient number, since it is larger than the sum of its proper divisors (10155615104).

20311230202 is a wasteful number, since it uses less digits than its factorization.

20311230202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155615103.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20311230202 its reverse (20203211302), we get a palindrome (40514441504).

The spelling of 20311230202 in words is "twenty billion, three hundred eleven million, two hundred thirty thousand, two hundred two".