20589799911 has 4 divisors (see below), whose sum is σ = 27453066552. Its totient is φ = 13726533272.

The previous prime is 20589799897. The next prime is 20589799913. The reversal of 20589799911 is 11999798502.

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 20589799911 - 2¹⁴ = 20589783527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589799913) 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, 3431633316 + ... + 3431633321.

It is an arithmetic number, because the mean of its divisors is an integer number (6863266638).

Almost surely, 2^20589799911 is an apocalyptic number.

20589799911 is a deficient number, since it is larger than the sum of its proper divisors (6863266641).

20589799911 is an equidigital number, since it uses as much as digits as its factorization.

20589799911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863266640.

The product of its (nonzero) digits is 3674160, while the sum is 60.

The spelling of 20589799911 in words is "twenty billion, five hundred eighty-nine million, seven hundred ninety-nine thousand, nine hundred eleven".