20409408299 has 4 divisors (see below), whose sum is σ = 23325038064. Its totient is φ = 17493778536.

The previous prime is 20409408241. The next prime is 20409408301. The reversal of 20409408299 is 99280490402.

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 20409408299 - 2⁸ = 20409408043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20409408499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1457814872 + ... + 1457814885.

It is an arithmetic number, because the mean of its divisors is an integer number (5831259516).

Almost surely, 2^20409408299 is an apocalyptic number.

20409408299 is a deficient number, since it is larger than the sum of its proper divisors (2915629765).

20409408299 is an equidigital number, since it uses as much as digits as its factorization.

20409408299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915629764.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 20409408299 in words is "twenty billion, four hundred nine million, four hundred eight thousand, two hundred ninety-nine".