20205506099 has 8 divisors (see below), whose sum is σ = 20264398320. Its totient is φ = 20146644000.

The previous prime is 20205506093. The next prime is 20205506131. The reversal of 20205506099 is 99060550202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20205506099 - 2⁸ = 20205505843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20205506093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490149 + ... + 2498249.

It is an arithmetic number, because the mean of its divisors is an integer number (2533049790).

Almost surely, 2^20205506099 is an apocalyptic number.

20205506099 is a deficient number, since it is larger than the sum of its proper divisors (58892221).

20205506099 is an equidigital number, since it uses as much as digits as its factorization.

20205506099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15061.

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 20205506099 in words is "twenty billion, two hundred five million, five hundred six thousand, ninety-nine".