20454785099 has 8 divisors (see below), whose sum is σ = 23377870560. Its totient is φ = 17531942976.

The previous prime is 20454785051. The next prime is 20454785119. The reversal of 20454785099 is 99058745402.

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 20454785099 - 2⁸ = 20454784843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20454785099.

It is not an unprimeable number, because it can be changed into a prime (20454185099) 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, 186167 + ... + 274895.

It is an arithmetic number, because the mean of its divisors is an integer number (2922233820).

Almost surely, 2^20454785099 is an apocalyptic number.

20454785099 is a deficient number, since it is larger than the sum of its proper divisors (2923085461).

20454785099 is an equidigital number, since it uses as much as digits as its factorization.

20454785099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121669.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 20454785099 in words is "twenty billion, four hundred fifty-four million, seven hundred eighty-five thousand, ninety-nine".