20652305899 has 4 divisors (see below), whose sum is σ = 20652788520. Its totient is φ = 20651823280.

The previous prime is 20652305893. The next prime is 20652305917. The reversal of 20652305899 is 99850325602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20652305899 - 2¹³ = 20652297707 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20652305893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170122 + ... + 265039.

It is an arithmetic number, because the mean of its divisors is an integer number (5163197130).

Almost surely, 2^20652305899 is an apocalyptic number.

20652305899 is a deficient number, since it is larger than the sum of its proper divisors (482621).

20652305899 is an equidigital number, since it uses as much as digits as its factorization.

20652305899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482620.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 20652305899 in words is "twenty billion, six hundred fifty-two million, three hundred five thousand, eight hundred ninety-nine".