20607943365 has 24 divisors (see below), whose sum is σ = 36591668568. Its totient is φ = 10722831360.

The previous prime is 20607943339. The next prime is 20607943393. The reversal of 20607943365 is 56334970602.

20607943365 is a `hidden beast` number, since 2 + 0 + 607 + 9 + 4 + 3 + 36 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 115734564 + 20492208801 = 10758^2 + 143151^2 .

It is not a de Polignac number, because 20607943365 - 2¹¹ = 20607941317 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20607943365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5582964 + ... + 5586653.

It is an arithmetic number, because the mean of its divisors is an integer number (1524652857).

Almost surely, 2^20607943365 is an apocalyptic number.

It is an amenable number.

20607943365 is a deficient number, since it is larger than the sum of its proper divisors (15983725203).

20607943365 is a wasteful number, since it uses less digits than its factorization.

20607943365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169669 (or 11169666 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 20607943365 in words is "twenty billion, six hundred seven million, nine hundred forty-three thousand, three hundred sixty-five".