20302311213 has 12 divisors (see below), whose sum is σ = 30336787260. Its totient is φ = 13068154176.

The previous prime is 20302311109. The next prime is 20302311221. The reversal of 20302311213 is 31211320302.

It can be written as a sum of positive squares in 2 ways, for example, as 16425754569 + 3876556644 = 128163^2 + 62262^2 .

It is not a de Polignac number, because 20302311213 - 2²⁰ = 20301262637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302311233) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 38893056 + ... + 38893577.

It is an arithmetic number, because the mean of its divisors is an integer number (2528065605).

Almost surely, 2^20302311213 is an apocalyptic number.

It is an amenable number.

20302311213 is a deficient number, since it is larger than the sum of its proper divisors (10034476047).

20302311213 is a wasteful number, since it uses less digits than its factorization.

20302311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77786668 (or 77786665 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20302311213 its reverse (31211320302), we get a palindrome (51513631515).

The spelling of 20302311213 in words is "twenty billion, three hundred two million, three hundred eleven thousand, two hundred thirteen".