20620601099 has 4 divisors (see below), whose sum is σ = 23566401264. Its totient is φ = 17674800936.

The previous prime is 20620601087. The next prime is 20620601107. The reversal of 20620601099 is 99010602602.

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 20620601099 - 2¹⁶ = 20620535563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20622601099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1472900072 + ... + 1472900085.

It is an arithmetic number, because the mean of its divisors is an integer number (5891600316).

Almost surely, 2^20620601099 is an apocalyptic number.

20620601099 is a deficient number, since it is larger than the sum of its proper divisors (2945800165).

20620601099 is an equidigital number, since it uses as much as digits as its factorization.

20620601099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945800164.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 20620601099 in words is "twenty billion, six hundred twenty million, six hundred one thousand, ninety-nine".