20416594365 has 24 divisors (see below), whose sum is σ = 35392708728. Its totient is φ = 10887636480.

The previous prime is 20416594361. The next prime is 20416594379. The reversal of 20416594365 is 56349561402.

20416594365 is a `hidden beast` number, since 20 + 4 + 1 + 6 + 594 + 36 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58155876 + 20358438489 = 7626^2 + 142683^2 .

It is not a de Polignac number, because 20416594365 - 2² = 20416594361 is a prime.

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 20416594365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20416594361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505105 + ... + 544025.

It is an arithmetic number, because the mean of its divisors is an integer number (1474696197).

Almost surely, 2^20416594365 is an apocalyptic number.

It is an amenable number.

20416594365 is a deficient number, since it is larger than the sum of its proper divisors (14976114363).

20416594365 is a wasteful number, since it uses less digits than its factorization.

20416594365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50589 (or 50586 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 20416594365 in words is "twenty billion, four hundred sixteen million, five hundred ninety-four thousand, three hundred sixty-five".