20310605613 has 12 divisors (see below), whose sum is σ = 29344533660. Its totient is φ = 13537176576.

The previous prime is 20310605611. The next prime is 20310605633. The reversal of 20310605613 is 31650601302.

20310605613 is a `hidden beast` number, since 20 + 31 + 0 + 605 + 6 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12061969929 + 8248635684 = 109827^2 + 90822^2 .

It is not a de Polignac number, because 20310605613 - 2¹ = 20310605611 is a prime.

It is a super-4 number, since 4×20310605613⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310605611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228756 + ... + 304877.

It is an arithmetic number, because the mean of its divisors is an integer number (2445377805).

Almost surely, 2^20310605613 is an apocalyptic number.

It is an amenable number.

20310605613 is a deficient number, since it is larger than the sum of its proper divisors (9033928047).

20310605613 is a wasteful number, since it uses less digits than its factorization.

20310605613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537868 (or 537865 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 20310605613 in words is "twenty billion, three hundred ten million, six hundred five thousand, six hundred thirteen".