20531630313 has 12 divisors (see below), whose sum is σ = 29660350720. Its totient is φ = 13686114456.

The previous prime is 20531630233. The next prime is 20531630321. The reversal of 20531630313 is 31303613502.

It is a happy number.

20531630313 is a `hidden beast` number, since 2 + 0 + 5 + 316 + 30 + 313 = 666.

It is not a de Polignac number, because 20531630313 - 2⁹ = 20531629801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20531630323) 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, 54673 + ... + 209886.

Almost surely, 2^20531630313 is an apocalyptic number.

It is an amenable number.

20531630313 is a deficient number, since it is larger than the sum of its proper divisors (9128720407).

20531630313 is a wasteful number, since it uses less digits than its factorization.

20531630313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273188 (or 273185 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The spelling of 20531630313 in words is "twenty billion, five hundred thirty-one million, six hundred thirty thousand, three hundred thirteen".